Second Hand Uni!

Does any1 in the UK have asecond hand 20" or 24" they would be willing to sell. I am hoping to find one for a friend of mine who wants to learn to uni. It doesn’t have to be at all good, just as long as its got one wheel that goes round! Please reply cos this means alot to me
Thanks
James:D

it needs to be quite cheap cos i’m a wee bit short on cash

I have a month old 24" torker that i might beable too sell. it comes w/ miyata seat. But it really depends on my schedule because im either buying a new muni(then id sell it to you) or im just upgrading alot.