It all depends on what you want and what you want to pay. I just picked up a R1200GS with 116K miles on it but it has been used. Plenty of niggly bits to fix up on it but it seems to run great. Time will tell I guess. I paid about 1/2 of the low retail on NADA so I think it was worth it. If it works out then it was a good deal, if things start to go south then I have some wiggle room for fixing it. But I am assuming that resale value will be nil down the road.
The reason I spouted all of this out is that I feel it would apply to the bike you are looking at. For the right price it could be an absolute gem, or a nightmare.
So using my criteria if you can pick it up for $1500 to $2000 I would say why not, give it a go.
Oh and BTW: The one I got has service records from brand new at a local dealer but they will not give them to me, even though the PO said it was OK. Some new policy about litigation again. Stupid people that sue. So I hope you ca get them as that would be a big plus.