I would say in rank order - condition; accessories; geography; scroll vs straight face plate. But in reality, geography is going to be the great dictator. A friend found mine for me. He only wanted $25. I paid him a bit more. People in this general area ask anywhere from $200-$600 on Craigslist in decent/good condition. Yet another board member here got one at a garage sale recently for $25. A little rough, no case/accessories. I'm cheap. I'll wait/look for a long time before spending big bucks on something like that. Last year picked up an electrified red eye for $50. Needs a bit of refurb but in (I think) overall decent condition.