Recently got my kenwood TR-751A from K3DUA who runs a ham radio shop called G & G Electronics.
No problems at all. The rig came double boxed with ALL the manuals, brackets, and everything that came with the rig originally in the original box, much of it still in original bags.
The rig works perfectly and is in nearly new condition.
I would definately recommend K3DUA if you are in the market for used gear