I paid $275 for an FN High Power that was an Israeli surplus pistol, I believe from AIM Surplus a couple years ago. It was a little rough on the outside but was mechanically perfect. I bought an older Hi-Power with really neat adjustable rear sight for about $350 that was possibly unfired and absolutely beautiful around the same time. The most expensive one that I own is a High Power Practical in like new condition for something in the $400s. I don't see a lot of High Powers out there for sale, but they are out there if you keep your eyes open for one.
There was a time, about five years ago, when I didn't own a single 9mm handgun. I didn't really desire one, but I had a whole lot of 9mm brass sitting around here. One day I was bored and I loaded up 500 rounds or so with the thought that I might someday bring it along and use one of my friends guns. So with all that brass sitting there, and plenty more reloading components sitting there, and me being a certified gun junkie, I eventually decided that I needed a 9mm of my own. Well, I have always been a 1911 shooter. I had been shooting handguns for years before the plastic guns came on scene. I tried the plastic guns and they didn't really pull my chain. So, it was logical that when I bought a 9mm, it would be a single action, John Browning design. Since then, I have purchased a number of other 9mm handguns. I have a Glock 17, a Ruger P89, a Kel-Tec P11 and I am sure a couple others that don't come to mind. I have also previously owned a few other 9mms and have fired quite a few others. For me, the Browning High Power is head and shoulders above all the rest. Again, IMO this isn't even a contest; there is the Browning High Power and then everything else somewhere in the distance.
I would love to take that Israeli surplus gun I have and use it as the foundation of a totally custom gun. To me, there is nothing more beautiful than a fully customized High Power. It is very expensive, but that is something I have never owned.
I have never used one of my High Powers in IDPA or IPSC. When I decided to try a 9mm in competition, I looked at what I had and decided on the Ruger P89. I had shot IPSC years ago and knew that my gun was going to take a beating. I was shooting thousands of rounds a month in practice, of course you drop your mags in the sand etc. I didn't want to put my beautiful High Powers to this kind of heavy use. That being said, I think it would make a fine competition gun for me.