Medium format's not THAT expensive anymore. I'd rather have a Hasselblad or Rolleiflex myself (or a Mamiya or Bronica for that matter) but if you got less than $300 to spend on a complete starter outfit, you could buy a Kiev 60 from Mikhail Fourman:
http://kievcamera.net/catalog/product_info.php?cPath=22_30&products_id=170
He's been selling the things for years. I bought one from him awhile back and it was okay for a Kiev. Out of the box, "new" Kiev cameras can look kind of crappy and really benefit from some detailing. Tough, heavy, a bit crude, but try getting a 30mm full frame fisheye lens from Carl Zeiss for $275! OTOH, I got my first Hassy outfit for $500, and I'd say the extra $$ was worth it.
And there's always the Rolleiflex and Rolleicord, Minolta, Mamiya, Yashica and Seagull twin lens reflex cameras. You can probably get one of the less-collectable Rolleiflex variants, with say a f/3.5 Schneider Xenar lens, for pretty cheap. Beautifully made too. Some of the postwar Rollei and prewar Zeiss Contax cameras are among the most beautifully made that I have ever seen.