2x 17" CRTs, laying around spare.
1.5GHz P4 on an E7205 based MB w/ 1GB RAM, sitting in a drawer unused.
Matrox G400 DH, pulled from field service.
10/100 NIC, left over from a spare project
Mid tower ATX case, left over from a PC that died
300W Power Supply, left over from testing.
PLextor 12/10/32 SCSI CD burner, pulled from a system.
Adaptec 2940U, pulled from a system.
Sony 8x DVD burner, doesn't read CDs.
Floppy, left over spare
I got a junkyard dog
Edit:
40GB Seagate from a test station that was disassembled.