You might not be as far from the truth as you think...

You can do a lot worse than look for the unfashionable cameras using a given mount. I see loads of Pentax SF7s and P30s going for next to nothing, the SF7 was the second camera to use the current AF K mount design after the SFX and it'll work with any full frame lens they've ever made. Price? You can find them for under 10 on ebay UK regularly. From observation the Canon and Nikon AF bodies can also be found cheaply if you're just after a working camera rather than the top of the range awesomeness or a collectable mechanical marvel.

My money would be on a Pentax SFXn with the AA battery grip, just makes it that bit easier to feed. Find one with the 35-70mm zoom and it's a cracker.