I bought a 10' x 10' shed last year cost about c£800, but then I had the hardcore, concrete base, wiring, insulation and finally lined the inside with sterling board. All in all it cost about £1300.
I've got 3 bikes in it at the minute (well 2 and a half built project), coupled with shelves and cabinet, there's no room left for doing any maintenance, work etc...
Oh wait, it's Grouch that wants the shed.....Strike my last sentence from the record...sorry mate