I have some friends who are giving away 8 racks of 32 U1 modules in the Chicago area. They were purchased in 2005 and as far as I know are fully working. Each module has:
1U form factor 3.2 GHz hyperthreaded dual Xeons 2GB memory two 10/100/1000 ethernet ports two small, 20-80 GBytes, disks. 1.7 A current draw Mounted 32 per rack with sliders. Racks are 36" deep. Power from Cyclades PM10 PDUs If anybody wants a rack and can arrange for transport, let me know. They are not giving away pieces, the basic unit is a rack.