Not a perfect search, but this is recently sold on ebay. A wide spread in prices for M6 bodies. Lowest price ones seem to have issues, looks like the $1200-1300 range is where they are these days. Repairs on these are not cheap, so a $800 bargain may take another $400 to fix. I'd contact some of the repair folks and get some idea of current repair costs before heading for the lowest price I could find.