Well, in this area there isn't a huge demand for horse drawn sleighs and even less at a farm auction sale where I bought mine. The funny part is, another Morgan person was bidding on the sleigh too but she quit early & when it closed at $250 she proclaimed it "a piece of junk". Why? Because it had been stored in an old granary, the covering had come off of it, and it had some pidgeon poop on it! I took it home, washed it off & had a perfectly lovely sleigh! Someone had put a lot of money into restoring it.
We used it only a few times; unfortunately in this part of the country we don't always get the right conditions for sleighing--roads get plowed bare and to drive in the fields there's either no snow or too much snow--or else it's just too cold. Not my idea of fun to be out sleighing when it's -30 with a howling wind! When we decided to resell it we advertised it for a long time with no takers and finally sold it at a local horse & tack auction.
Had we been in some other location where winter driving conditions are more ideal and more people are into driving, we might have been able to sell ours for more (and likewise had to pay more for it).
Also, around here people are very into the "I can make one just like that for a lot less money" thinking. In reality their home made sleigh will be much less streamlined and attractive than an authentic version, but for their purposes their home made one works very well. So, they won't pay more for an authentic one.
Edited to add: I just looked at Leia's links--the "sleigh" we had was actually a McLaughlin cutter, identical to the one on the Summit View Carriage site, except ours was black with red and the upholstery was a plainer fabric, not velvet. I have photos somewhere, but I have no idea where I'd find them now.