How cheaps cheap, and what spec are you looking for (car wise). Ie. do you need one for a project, or one as an a-b car, will it be temporary or long-term (ie. ideally you would have a long MOT on it etc).
The more details, the more likely someone can help.
Btw, I got a 10mm spanner to sell if you want it, £15, Draper Value drop forged steel.