For a good and simple manual SLR (assuming, that's what the original poster has in mind), I would look at the Minolta SRT's (solid, cheap, good lenses [Rokkors] available everywhere), the Nikon FM's (solid, maybe not quite as cheap), and the Olympus OM series (again solid, a tad more expensive maybe). These are the ones I have had experience with; there are many more good camera makes and models out there (the Pentax K1000 is almost a cult) and there really isn't one which is "best". It all comes down to what the poster feels happy with and can afford. Now if you find a cheap Nikon F2 ...

Cheers,
Chris