Quoted from Max_Badazz:

About 7 years ago, I was selling a game that was fully working (no issues at all). I had the game running before he showed up. It was his first game and he brought a collector friend. After playing a bit, the guy buying it was chatting with me about my other games while the collector friend was looking it over. He then said that the buttons on the coin door to get the audits and settings was not working. He then says the wires are cut. Hmmmm, since I just used them to set the game to free play from taking tokens, that seemed odd. I look and they were all cut evenly, like someone snipped them at once. They wanted $300 off the agreed price after that. I said those wires were fine (saying I just used them to switch to free play) and I will solder them back and keep the price the same..... they took it without the fix at the original agreed price without talking much more.
I was pissed that one distracted me while the other cut the wires. Plus wanting $300 off...WTF.