Well for some reason I just cant throw or sell hardware ... i have boxes ( several of them ) with old Mb`s and stacks of ram ranging from edo to ddr2 ... even have two disassembled laptops ... Any thing that can be reused ..is reused ... as for the rest ... well I have a small lab .. where I do weird and wonderful stuff with them ,like testing for min reqs of Os`s and then trying to get them to run on less , testing linux distros OC testing ... heck I even tried to multiplex 2 PIII machines with a custom build PCI multiplexer ( with some success ) ...
Nothing is wasted with me … Have a home made router made out of a PII , a Gateway machine that doubles as a media hub , web server , VPN server and torrent client on a Sempron 2800 + with 768 of ram , and I use my previous Pc ( Athlon FX , 2 Gb ram , Ati X1950) as HTPC .
As for the older ones .. as I said .. get a low req. Linux distro like Damn small or Tiny Me and you can do almost any thing on them .So they are actually still quite usable .