You’ve seen it on the casino floor for decades—the unmistakable clacking of reels, the generic bell tones, and the frantic button mashing when the third diamond lands just one space above the payline. Now you want that experience in your basement. But buying a used IGT Triple Double Diamond isn't like picking up a TV on Facebook Marketplace. You’re dealing with heavy machinery, complex voltage requirements, and a patchwork of state laws that could turn your dream purchase into a legal headache.
Unlike modern video slots packed with bonus rounds and animated characters, the Triple Double Diamond is a relic of the mechanical era that refuses to die. It’s a 3-reel, 9-line game that pays out massive wins when the Triple Diamond symbol acts as a 3x wild multiplier. Nostalgia drives this market, but finding a working unit that won't cost you a fortune in repairs requires knowing exactly what you're looking at.
Difference Between Triple Diamond and Triple Double Diamond
If you’re scanning listings, you’ll see "Triple Diamond" and "Triple Double Diamond" used interchangeably by sellers who don't know the difference. They are not the same machine. The classic Triple Diamond is a 3-reel, 9-payline game where the Triple Diamond symbol substitutes for any other symbol and multiplies the win by 3. It’s a standard stepper slot.
The Triple Double Diamond, however, is a different beast—often a 5-reel video version or a variation of the Double Diamond Deluxe mechanics. In some cabinet configurations, you’re getting "Triple Double Diamond," which combines the wild multiplier mechanics of both games. In practical terms, this means the paytable is more volatile. You’ll drain your credits faster chasing the top jackpot, but when those wilds align, the payout is significantly higher than the standard version. Before you hand over cash, pull the game chip tray (if accessible) or ask the seller for a video of the boot-up screen to verify the exact game EPROM installed.
Legal Restrictions on Owning Slot Machines
This is where most buyers get burned. In the United States, slot machine ownership laws are determined at the state level, and they vary wildly. In states like Nevada, you can own pretty much anything as long as it’s a legitimate gaming device. But in states like California or New York, you generally need a license or the machine must be considered an "antique"—usually meaning it’s over 25 years old.
Since IGT released Triple Double Diamond cabinets primarily in the late 1990s and early 2000s, many fall into that antique category now. However, states like Alabama and Connecticut strictly prohibit private ownership regardless of age. If you buy a machine in a legal grey area, you aren't just risking a fine—you could have the machine confiscated by local authorities. Always check your state gaming commission’s statutes regarding "amusement devices" versus "slot machines" before arranging shipping.
Cabinet Types and Hardware Condition
Most Triple Double Diamond machines you’ll find for sale are IGT S2000 models. These are the workhorses of the casino industry—heavy, metal-framed cabinets with physical reels and hopper dispensers. They weigh between 200 and 300 pounds. If a seller lists one for local pickup only, they aren’t being difficult; they just don’t want to deal with freight shipping.
When inspecting a unit, ignore the cosmetic cabinet condition for a moment and focus on the internals. Open the main door (if the seller allows it) and check for corrosion on the power supply board. These machines generate significant heat, and blown capacitors are common in units pulled from smokey casinos. Ask specifically if the battery on the motherboard has been replaced. If the battery dies, the machine loses its settings and won’t boot. Replacing a battery on an IGT board is a simple $5 fix, but a dead battery is a red flag that the seller hasn't maintained the machine.
Where to Find Working Machines
You won’t find these at Best Buy. The market is split between dedicated slot machine resellers, auction sites, and local classifieds. Resellers are the safest bet—they often refurbish machines, install new coin comparators, and offer a limited warranty. You’ll pay a premium, usually between $800 and $2,000 depending on the cabinet condition and the rarity of the game chip, but you get peace of mind.
Auction sites like eBay are hit or miss. Shipping a 250-pound cabinet across the country costs more than the machine itself, often exceeding $300 via freight. Local pickups are ideal, but verify the machine powers on before handing over cash. A common scam involves selling a "parts only" machine without disclosing that the main board is fried. A working S2000 should boot to a "Call Attendant" message or directly to the game attract mode within 30 seconds of powering up.
Maintenance and Repair Costs
Owning a slot machine is like owning a vintage arcade cabinet—something will eventually break. The most common failure points are the reel motors and the optic sensors that count coins. Replacement reel motors for IGT S2000 cabinets cost around $40 to $80 each, and they are easy to swap out with a screwdriver. Optic sensors are cheaper but require some delicate soldering or simply reseating the connectors.
The bigger issue is finding replacement glass and belly stickers. The exterior art on Triple Double Diamond machines fades or gets scratched. Reproduction art exists, but purists prefer original glass. If the machine has a chip in the top box glass, be prepared to pay $100+ for a replacement if you can find one. Joining a forum like-slotmachineforum.com is essential; the community shares manuals, EPROM images, and troubleshooting guides that will save you hundreds in repair bills.
Pricing and What to Pay
Prices for a Triple Double Diamond slot machine have stabilized, but they fluctuate based on location. In the Midwest, where demand is lower, you might find a working unit for $500 to $700. On the West Coast or near casino hubs, the same machine can fetch $1,200 to $1,500. Don’t overpay for a "mint condition" label; these machines were designed to be pounded on by strangers for years. Focus on mechanical function over cosmetic perfection.
Be wary of any listing under $400. At that price point, you are almost certainly buying a "project machine" that will require immediate repairs to the power supply or bill validator. A functional bill validator (BV) is key if you want to feed bills into the machine rather than coins. A working BV-20 or BV-30 validator adds $100 to $150 in value. If the seller says "the bill validator isn’t working but the rest is fine," budget for a replacement.
| Cabinet Model | Avg. Price Range | Common Issues | Weight |
|---|---|---|---|
| IGT S2000 (3-Reel) | $600 - $1,200 | Reel motor failure, battery leak | ~250 lbs |
| IGT Game King (Video) | $800 - $1,500 | Monitor burn-in, touch screen | ~200 lbs |
| IGT S+ (Older Model) | $400 - $800 | Hopper jams, outdated EPROM | ~220 lbs |
FAQ
Can I buy a Triple Double Diamond slot machine if I live in California?
Yes, but with strict conditions. California allows ownership of slot machines that are over 25 years old for personal use. Since most Triple Double Diamond cabinets were manufactured in the late 90s, many qualify as antiques. However, you cannot operate them for profit or place them in a public business. Always check with local city ordinances, as some municipalities have stricter rules than the state.
Do these machines take real money or tokens?
Most used machines come with a coin comparator set for casino tokens or quarters. You can use real quarters if the comparator is adjusted correctly. Many home owners convert the bill validator to accept standard $1 bills. The machine doesn't "know" the value of the money; it just counts coins based on size and metal composition. Some owners rig the hopper to pay out manually or switch the machine to "free play" mode.
How hard is it to change the odds on a home slot machine?
It requires changing the game chip (EPROM) on the motherboard. IGT machines have a range of payback percentages built into different chips, typically ranging from 85% to 98%. To change the payout percentage, you need a new chip, which costs $20 to $50 from specialty electronics suppliers. It is not a setting you can change via the button panel; you have to physically swap the chip.
Will a Triple Double Diamond machine fit through a standard door?
Yes, but barely. Standard interior doors are 30 inches wide. An IGT S2000 cabinet is roughly 22 to 24 inches wide, giving you a few inches of clearance on each side. The challenge is the depth and weight. You will need a furniture dolly and at least two people to move it safely. Remove the hopper and coin tray first to reduce weight and prevent internal damage during transport.
What does 'key 23' or 'key 22' mean in the listing?
This refers to the chip denomination. A 'key 23' chip might mean the machine is set for dollar play, while a different key corresponds to quarters. It also relates to the multiplier logic on the motherboard. Ask the seller for a photo of the chip tray so you can verify the denomination matches what you want to play. Converting a dollar machine to a quarter machine usually requires changing the hopper and reel strips, not just the chip.