There are hardly any older S&Ws in .45 Colt. The first regularly cataloged one was the M25-5 in the 1980s, with occasional fits of 625 variants in .45 Colt off and on after they went largely stainless.
I consider these internet price checks worthless. A current production gun will be available somewhere between wholesale and retail prices, bargain with your dealer(s).
A discontinued and likely well used gun costs what IT costs. What somebody else paid for one has little meaning. It is unlikely the condition was exactly the same, he may have bought it months ago before a magazine article pumped up the prices, or in a different area where such things are more or less popular. The only question is, how bad do you want it?
Ordering used guns from print or net advertisements is a major pig in a poke project. I used to do it every once in a while but was often disappointed, occasionally got what I expected, and was very rarely thrilled. Last new gun I ordered was pretty much in the same class, for that matter.
A Smith & Wesson Hand Ejector is a revolver from which the empties are ejected by hand on the rod of a swing-out cylinder; in contrast to the automatic ejection of their earlier top-breaks. It is the mechanical design, not an individual model or caliber. There are Hand Ejectors of many calibers from .22 to .455, you can see a lot of them listed in the Blue Book. Amongst S&W afficianados it usually seems to be taken to mean the various models of the .44 Hand Ejector. Some of the more important guns got their own model names, like the Military and Police.