A few years ago I'd have jumped on such a collection. Now I have to fight to stop people giving me old crap they "think" I'd be interested in. Oh, b00tdisk likes computers, he's a techy guy, maybe he wants this? ... and I get an AMD K6-2 laptop with 48mb RAM, no USB, long, long dead battery (completely dead) and Win98 (not SE) installed on an 800mb HD. Yeah, no, just keep walking with that. Or single-core P4 boards. "Oh I thought you could salvage the ram at least". Yeah let me think about what I can use DDR1 PC800 memory in. OK, got it: keychains. "Hey could you use a spare monitor" - no. Take your glass tube, pincushioned wobbly eyestraionovision brand 14" CRT and keep drivin'.
Software: "Hey I was at goodwill and they had computer games for $.50 each, I picked up a bunch for you!" and here come the piles of "Windows 95" games that are actually DOS games with a Win executable (that dumps you into DOS to run the game) or stuff on floppies or junk that's newer but just plain bad like "10000 puzzle games!" (5000 tetris clones, 2500 concentration variants and 2500 bejeweled rip-offs), old copies of encarta (helpfully informing me that travel in the Soviet Union may require special contact with Intourist), and on and on and on.
Ugh.