Wanted: Damaged wheels to practise building?

Hi everyone,
Ive been thinkin recently about learning to build wheels, have a mate that can teach me and although ive been building bikes for a while, I am yet to build a wheel and I would really like to.
The free wheelset that got given away a while ago got me thinking - does anyone happen to have an old damaged wheel set sittin around that I could use for practising truing and then rebuilding completely? rather than buying good rims and risk ruining them Id rather get damaged bits already for practisin.

Obviously, its just to learn on so size/type doesnt really matter although it would be nice if there were a fixed 700c wheelset which would mean I had something I could use on the frames im working on right now (if i did a good enough job) but i know that may be pushing it!

thanks, drop me a pm if you have anything and let me know how much you want.

hi,
ive got a 24 spoke 700c front wheel, i found it when i was drunk and then when i got home realised its damaged. it seems that the rim is bent, likely it took the impact of a crash so it could be more than just a case of truing. you can have it for nothing, im at uni in portsmouth atm and dont know when il be back in london, but if you want it, itl only cost you the postage. PM me if your interested