well, I have 2 gameboys... one original that's grey, and one "play it loud" series gameboy that's yellow with really dark purple buttons. Trouble is...the grey one's screen is screwed up; there's at least 1 liine going thru it, and I got bored and melted off the part that covers up the game cartridge on the yellow one, so I don't think you'd want either one of them. I'd have no trouble parting with the grey one, but I don't think you want it. It's also missing the screen protector thing(that grey border thingy that says "dot matrix with stereo sound" or whatever the hell it is, I can't remember). If you want though, I can have my dad try to find one at an auction he goes to all the time. He just found a box with some random crap and an SNES that works perfectly with 3 controllers for 50 cents(the whole box was 50 cents, meaning the SNES actually cost about 10 cents, if even that). He finds SNES's and NES's there all the time, I'm sure he could find a gameboy too. I already have him looking for a GBA, Gamegear, Genesis, and Nomad for me anyway. Just let me know, and I'll have him looking for a regular gameboy too. Depending on how cheap he can get one, I can sell it for like 5 bucks most likely, maybe even less than that.
*EDIT*
Okay, make that about 7 lines going thru the screen of the grey one... I have no idea what the hell happened to it.