Looks like you not only want a shooter, but you want a collector as well that will increase in value. That pretty much rules out refurbished Colts, as their collector's value has taken a big hit with the reburbishment. For the amount of money you are willing to spend, you might want to consider an original Smith and Wesson Schofield. Almost all of them saw action in the old west by the US Cavalry, but some are still in decent condition. I had one once and, like a stark raving fool, I sold it. The 45 Schofield cartridge is easy to load for. Starline makes the brass and LYman makes the dies. The bullets are standard 45 Colt lead bullets, but I strongly recommend using pure lead bullets, as the harder alloys will slowly stretch the frame with repeated poundings against the forcing cone.
For that price range, you might be able to get a pretty nice S&W New Model #3 in 44 Russian, or an even more desirable S&W 2nd Model American chambered in 44 Russian. I had one of those once too and like a blistering idiot, I sold it. The 44 Russian is also easy to load for, with Starline making the brass. I forget who makes the dies. Here is a photo of the one I had so you will know what I'm talking about (made in 1873) ...
... and here is what a Schofield looks like (sob). It was made in 1875 ....
Once you have decided what you want, if it is a S&W, PM me and I might be able to help you snag one, but it will be coming from the USA and Canada Customs charges HST when it comes across (I've brought a couple of them across and had to dish out the $$ for the GST/PST/HST).