In the information age in a capitalistic society, supply and demand are tightly intertwined. Buyers can research manufacturers, find consumer reviews (if you can sort them from the faux reviews), and learn pricing before even setting foot in the door of a store to lay down hard earned dollars.
What does that have to do with your question? Well, it means that a manufacturer that attempts to jack up its prices above what is supported by the quality and value of their product will soon not be selling enough product to stay in business. Sure, there are retail markups to contend with, but retail prices are significantly impacted by wholesale prices.
So in general, you get what you pay for. Buy a $450 1911 and you'll get less than if you buy a $900 1911. It's easiest to see this within a brand. Look at an entry level rack Kimber and compare its cost to a semi-custom shop workup of that same gun. The extra $400 gets you a bunch of added value.
Now compare a $1250 Kimber to a $2500 Les Baer. Some differences you will see, and some you'll feel. Is Les Baer a bad buy? No. But Les Baer is out of most folks reach.
So bottom line, if you are looking at 1911s from companies that have been around awhile, you will get what you pay for, and you will get more if you pay more.