I got my mamiya 7 with 80 f/4 from KEH for a little under 1200. The camera body was listed under BGN and the lens was EX. There is a scuff down to the metal right by the shutter release but that is the only cosmetic flaw I can see, the camera is perfect mechanically and optically. The lens is flawless. I'd definitely buy from KEH again and tell people to look there.
I have been burned by ebay numerous times. Either the seller misrepresents an item and won't take a return then paypal won't force a refund, the seller flat out doesn't ship the item, or the seller ships the item in a pillow case (true story). All sellers had high and recent positive feedback counts. I used ebay for a little over 8 months and the seller's fees and disadvantages to the buyer have made me quit the site.
These points are all beside the original point however, so I would say go with KEH or a reputable second party even if it costs a little more.