IF you mean about my car in general, well... I probably spend 18 bucks a week on fuel... change the oil (five quarts)/ filter every 3 months, and probably ahve to add one quart over the coarse of those three months..... uhh.... probably other junk I can't think of...
But if you mean for my mp3 player project.... well lemme think about that.
I bought a CIDCO Mailstation machine the other day, with intentions to use the display from it... that might not work out after all though.... $5.00
The current display I'm using (still in the early stages) is a 2linex 24 char Alphanumeric display, not backlit, controlled by an HD44780. I ripped that out of an old router..........$0.00
Most of the computer hardware I already happened to have... except the hard drive I bought a while back, it's been a while .... I think it was about ..........$15.00
Tha'ts about all I've bought for my project so far.