I have a 90s old roll mark Colt 1991A1 that I had costumized by Sprigfield. Essentially I had it turned into a loaded model with tighter frame to slide fit and barrel bushing. Hard chromed. I got it for sub 500 IIRC, it's been 15 years. I put 2200 into it. I was considering trading it for a Smith 24 snub a coworker has. I think he will owe me cash but I have no clue how to price anything other than stock or close to stock guns.