He gets bad gun advice on Pawn Stars once in awhile. I remember his “expert” telling him the loading gate on a Single Action Colt was mismatched because it didn’t match the serial number. They don’t - they match an assembly number stamped inside the frame ahead of the cylinder bolt sprint. You have to take off the trigger guard to know if its mismatched or not.
A guy brought in a Colt Musket, marked for the New Jersey Militia - a contract for them likely. Couldn’t figure out why it had no cartouches from the Federal Inspectors on the stock like most Colt muskets. Well, why would it have Federal inspector’s marks on it if it wasn’t sold to the Feds? He officered 1200.00 for it and the guy walked. The Italian replica of the Colt musket sells for almost that, and this original was about new condition. They said the stock was replaced - not likely! There have been other examples, including the US Ord Japanese mine kit. There he paid too much - probably about retail.
Trouble is, the guy wants to double or triple his money on everything. You have to do that in a store on inespensive items, because you have to make enough money to cover your display space, expenses, paper work to sell it, etc. On very expensive stuff, where you are talking profits of thousands of dollars even if sold at only a 20% profit, it isn’t necessary to double, and it makes making a fair offer impossible. Just my take after 36 years of doing the same thing he does.