2nd hand stuff here is gd! and everyone is willing to talk about it all!.
If you are going to buy alot of gear and maybe gear that is unavailable over here try some of the major US stores and have a look at there shipping policy but overall ure better off from the uk as the prices go way hi! after customs and postage! plus it takes long and u know what everyone is like with the postage!.
Do a search on the uk stores and if they dont have what u want post it up on here and im sure people will be able to get it.