its a bit early in the season for buyers,, so prices and sales are a bit slow right now, as more people get tax returns and it stops snowing people tend to start buying bikes. In many areas of the US the buying season is said to be 3 months,, I know dealerships who swear by this.,, I tend to believe buyers tend to buy from April to August.
I see just as nice bikes selling for less or taking forever to sell,,, often at much lower prices, the problem though is on eBay and CL you cant always inspect them, if you meet the guy and he seems solid, and the bike really seems solid, I dont think thats a BAD price, but it isnt great either.
I bought a 2007 Firebolt for $1900 and it had issues but was a solid bike, just needed sorting out, and some money put into it. Ive seen comparable no issues bikes like the one you are looking at between $3500 and 4500 all the time, his price is a bit high, but he is on the east coast and im on the west coast, so not really a fair comparison, plus southern states tend to get more in prices,, Im told the bay area of Calif had more Buells sold than anywhere else in the US. regions matter in sales. But Buells are rare to begin with, they get parted out at the drop of a hat, and wrecked, so a good one is worth the extra money if its the right deal for you. If it were me and i was spending YOUR money id feel better around $4500 and have CASH with you, work the angles for the Factory manual, parts book and any accy he might have not mentioned in the ad. I always feel better buying a bike if i know the owner actually looked at the manual, plus the little things add up, if thrown in on the deal its just sweeter. good luck