I actually have one of those kits, in the handy-dandy yellow plastic toolbox.
There's a spare 60Gb Maxtor hard drive, spare IDE CD-ROM drive, Knoppix CD, 10/100 PCI ethernet card, AVG, Windows ME boot floppy, Radeon 7000 PCI video card, a small 20Gb USB external drive, Digital Dolly CD, USB/PS2 mouse adapter, USB/PS2 keyboard adapter, 4-port USB hub, baby food jar full of assorted computer screws and motherboard standoffs, one tube of Arctic Silver 5, power cable, USB cable, micro VOM, and various types of memory.
And a Leatherman Wave.