NIB is a key to condition. A complete package is the best way to find them. A convertable 357/9mm Bisley isn't an easy find. If it's a gun you want, and are not looking to buy just to try & resell, then it's a question of how much you want one. I saw a used Bisley 45 Colt in blue yesterday for $550. The 357/9mm is harder to find than the 45's.
A wise man once told me; "sometimes you get good deals right away, and sometimes you just pay a little too soon." It may seem high or close to a cut-off point right now, but in a few years, will you be kicking yourself because you passed on it?