I got my first Mac, a Power Macintosh G3 AIO off of craigslist for $10 (Plus $5 for gas). It was just the computer so I bought the keyboard, mouse and a modem (Which is probably worth nothing) for $20 from Ebay and a store in a nearby town.

In total it cost $35 and after a little research, I found out that they were hard to come by and were only released to schools. Another cool thing is that it came with over 500 games and software titles! I plan on buying more MACS in the future.