Went to the flea market today and picked up some power supplies and a Radeon 6870. The video card isn't exactly retro, but it should work pretty well in a Windows XP rig - and I have just the system for it - IF it works.
The power supplies all work. The 500w antec had a sliced ground cable on the PCI-E 6 pin line, but I'm going to solder it back up good as new. The gold psu - I've never heard of this brand, but it weighs a ton and has a pretty beefy 5v rail. No SATA or PCI-E connectors and it sais pentium iv on the label 😁 - might be a great unit for a fast socket A PC, alltrough 500w is a bit overkill for that.
I'm going to take all of them apart, clean them and check the capacitors.
All in all not bad for 24 euro.
[UPDATE]
The 6870 works! Kind of hard to believe since it's been sitting on god knows what for god knows how long, no anti static bag. People here sell this stuff from blankets laid out on the ground outside. There was a 6850 there too, and some DDR3, but I didn't pick any of it up since the 6850 had some wierd aftermarket zalman cooler that was missing the cover, and the asking price for the DDR3 was a bit much.