Because that Pony stamped on the side is strong Kool-Aid
Colt fans are loyal to the death to their gun of choice, you should see some of the Colt forums. They call S&W an "off brand" and if you post a pic of a Ruger you might as well just put a paper bag over your head and get ready for a storm of flames....if you shoot a GP100 you are an unwashed peasant to a few of these guys....and don't even mention the dreaded "T" word that comes from Brazil......not ALL Colt guys are like this, but some are what I call "Colt snobs" as in, "Why would anyone collect anything else?!?!" Which is cool, actually......we are all "loyal" to our gun brands, I like to see people so deeply rooted in their loyalties like that.
Plus, Colt was the 1st in the revolver game, being the first guy to market them commercially. It's debatable whether or not Sam Colt made THE first revolver, but he was the first to be succesful at it. Colt made his first one in 1836 and Colt wheelguns have seen service in every war up through Vietnam. There's a lot of history there, and a lot of loyalty.
As far as prices, you can still get ex-LEO and security Official Police and Police Positive .38's for $300 if you look around, these were Colt's basic service revolver and they made a ton of them. I'm not a "Colt guy" but I own a few, my Police Positive is a fine gun, so is my King Cobra. I'll probably never own a Python but I'll take holster worn OP's for $300 all day long.
The only thing that turns me off to Colts is their need for periodic "tuning". If your Colt goes out of time, and you don't have the skill to fit a new hand, good luck finding a gunsmith who will work on a Colt revolver.......sure, they may go many 1,000's of rounds without a need for a "tune" but my S&W's and Rugers will never need this. It takes a lot more for a S&W to go out of time, but if a Colt is "loose" it is not in shootable condition. If you're looking at used Colts, and it locks up like a Smith with a little play, it's close to being out of time, or may already be.
No doubt the "Snake Guns" are extremely well made and very accurate, but I don't think the average guy is gonna see a difference over a 27 or 29.