You can get a Mamiya RB67 with a normal lens for well under $300. It is a bit heavy for non-tripod use.
The classic entry level was a TLR with a normal lens. The 124g was cheap, but even Rollicords and Mamiya TLRs (with interchangeble lenses) are modestly priced.
For $1000 I'm pretty sure you can get a Hassleblad setup. I'm seeing bodies for under $500 on KEH. Private party sales of lens, body, finder and back...under $1000 should be doable in decent condition (I'm pretty sure I've seen them for less at local stores). Less if you don't mind a more worn looking model.
If what you really want is a 'blad and you can handle $1000, I think you should get what you want. 


