Single Most Expensive Gaming Purchase You've EVER Made

Consoles shouldn't count for the purpose of this thread. No duh, they're expensive.

My most expensive purchase was paying $88 USD for a rare, near-mint PAL copy of U-four-ia for the NES. It was one of the last games produced for the system and was released in very limited amounts. The game received high praises from reviewers, but because the market focus was shifting toward the SNES, the developer, Sunsoft, scrapped their plans to release it in Europe and North America.

It's a fun game and works perfectly. I doubt I'd ever sell it since the odds of finding another copy are slim to none. I must've staked that auction out for a week. I even requested the day off work so I could be home to snipe the last bids.

Jam it back in, in the dark.