Choosen answer:
I bought my Pentax K1000 from ebay – I know lots of people who have managed to buy good working slrs from sellers.
I think I paid about £50 – obviously second hand!
If you are after a 35mm then you should be able to get your films processed most places, but if you can gain access to a dark room it is so much more fun!

If you know better then please let us know below