Hi, I do a good bit of buying and selling on e-bay and e-bay motors and in my experience it has been the best place to determine the selling price for an item, I would suggest you spend some time looking at the completed sales on e-bay motors for any motorcycles near in age and condition to the one in question, one other suggestion, after you have done some research, is to actually list the motorcycle with a HIGH reserve amount if only to see what it bids up to, a reserve amount of say 10,000 dollars may cost you a hundred dollars when you post your listing but you may get some very useful information from it, hope this helps, Phil.