Thanks for all the replies again, I eventually got the MX today for just £30! It isn't in perfect condition but only a couple of small dents and a few scratches on the bottom, and the hot shoe doesn't work, any flash needs to have a wire connecting it to the camera, otherwise it's very nice. The two lenses weren't Pentax, the 28mm was Cosina and the 50mm was Chinon I think, it has a Cosina lens cap so I'm not sure. Are they good lenses? They both seem nice to me.
If you have any other suggestions for me for anything please tell me
Thanks again, James