^^ Thats's a beauty! I've always liked the fluted 1860's. Think those and the Pocket Police are the best looking of the Colts.
The one on GB sold for $480, which I would say is about right. $500 is more or less what a really nice one ought to cost... even a good shooter is worth over $400 these days.
(The box-o-Centaures is arriving in a few days, sadly I am on the road and will not see them for nigh a month...)