Seeing as I'm not putting them up until I've tested, I'll tell you what I think I have roughly.
2x P3 1GHz Coppermine (SL52R, untested but pulled from working systems. Cannot test these, none of the boards below support them)
1x P3 650MHz (SL3XV, not sure if this works. Has an AVC cooler)
Some SDRAM (not as much as xd has)
3x P3 boards (one Slot 1 (MSI), one Socket 370 (Gigabyte), one with both (Tyan) the slotted boards worked last time I tried them. S370 on its own board is untested.
1x Socket 7 K6 board (MSI, powers up I think but not sure. A few caps look a little dodgy but this is fixable with an afternoon of soldering, I believe)
1x K6 2 500MHz (needs testing, currently resides in above board. Has Akasa cooler)
1x ATI Rage 128 Pro (it's got some header pins that are bent, can try and bend these back. Untested)
1x P3 450MHz, Slot 1, works as far as I remember
1x P3 500MHz, works as far as I remember, slot 1.
Let me know what you are interested in and I'll test it at the weekend. Once tested I will get XD or TriBeCa to put it up. (tl;dr please don't put them up yet )
Not sure on the weight, if someone can get me a rough estimate I'll calculate shipping. Bear in mind packaging costs would have to be added as well.