I have no clue what "BGN' actually means. After 4 purchases this year, every product looks "Exc ++" to me. Including the recent Nikon digital. Maybe because it had 18k shutter count? It looks perfect and is operationally perfect. Certainly a lot "Minter" than the "Near Mint" cameras on Ebay from Japan. Maybe the word mint doesn't translate well.
The only issue I've ever had from KEH is the package being left at the end of my 100 ft driveway. But that's not KEH. That's those morons at FedEx.