Well given the winning that goes on when someone suggest a price on something.
IMO 2k for that? Tell him he's dreaming.
You could make a Frankenstein bike with one of these like the 79 Maico's You can really get these 250 motor's to a good 38 HP just as fast the 81's and that's fast enough.
As I have a nice 81 250 It doesn't interest me right now and my 77 project is sucking my bank account dry but it will be as new when finished.