There is a fair bit of handspun yarn on etsy these days -- maybe check out their prices? But be sure to check the variables -- weight of fiber, length of skein/WPI of fiber, fiber/dye used, number of plies -- and you can also see how much they've sold, which is one way to tell if they've priced it higher than the (etsy) market prefers.
Now, that's just etsy -- I don't know how "etsy" prices compare to ebay or other placed online where people may be selling handspun.
(posted by me on TechSpin this day)
The picture at the top is some cochineal dyed wool on a Jenkins Turkish spindle. Two-ply, worsted-to-bulky, intended for nalbinding, under 2 ounces. Probably enough for an accent in the nalbound slippers it is meant for ... I'm thinking hot red toes, grey foot.