theres no such thing as a 600D
there was an EOS 600 back in the late 80s/early 90s, thats probably what youre looking at here. Itll be horribly dated, but you might get a tenner for it, £20 if youre lucky. I say might because I put a Pentax of a similar vintage on Ebay a couple of months ago with a starting bid of £5 and it didnt sell.
Film SLRs are a buyers market at the moment, except for one or two really collectable models they sell only because people want the lenses.
yup thats what I meant. Dont really care for the body. Its the lense I want as it an EF lense, so will fit the 400D :-D