Best (cheapest) FILM camera for learning the basics

[w349]

Firstly, I realise this is the digital SLR forum. However, I've been asked to teach someone the basics of photography and I would like to start by having them use a film camera. The reasons for this are twofold; firstly, I think it will be a better way to understand exposure and composition because you have to really think about your shots (or run out of film quickly, and at £4 a roll that's an expensive habit!) and secondly... and probably more importantly to me, I have a pool of FD glass sitting around that could be put to good use.

So... what's a cheap and cheerful film camera that I can pick up from eBay - or even another forum member - without breaking the bank? Obviously it must be FD mount and offer full manual control.