Where to buy frames/bikes?

I'm looking for a few secondhand bits and pieces; something to tour on this summer -a proper tourer or an mtb- , maybe new frame for my fixed, and a folder for a mate. I check ebay & gumtree often enough but not seeing much. Am I missing any good resources for finding such stuff online or about london?
cheers.

oh, and on the off chance, i'm looking for 21"ish frames.

look here, but give mesuments in metric, im a yank and i dont know what a 21" bike looks like.

Oh my, tourer, MTB, fixed, folding... you need to decide which bike you're looking for ;)

maybe the guy's used to mtb measurements. mtbs are usually in inches.

as far as i know, yanks (gov't standards, engineers, etc) are still on the old measure

what kind of folder you looking for 16", 20", 26" wheeled? im thinking of selling mine

Cris crash, 21" is about a 54cm. And it looks very much like a bike measured in cm :-)
Fatboyralph, A something with 16" wheels I think. [C.C., dont panic. thats about 40cm]. Could you send me on any pics?
Roberto, for a man with no money I'm surprisingly greedy.

cheers guys, but anyone know any good web sites for this stuff other than ebay?

bikeradar.com anothercyclingforum.com cyclechat.co.uk singletrackworld.com

try ctc.org.uk forum too, Tourersville Central

skim through dunpsters, i've found a couple vintage hetchins and njs track frames this way.

whaaaaat? You wind up, all you'll find is used johnnys and rats and stuff

this was the end prodect of my one and only dumpster dive. healthy profit as well :D

What - whitespace db? Remember that 'Dumpsters' only exist in the US, in films and on teh internets.
'SKIPs' in this country - laaanndahnfgss.com - alright?!

dumpster diving is the shit! :) but dumpstered track frames must be stolen...

// Hans - atm livin' on dump to pay for my blingbling vivalo :)