[lugerholsterrepair]

Jon, Well, yes and no. There is eBay..Gun Broker, Simpson's site, Charlie justman and a dozen others. It takes a lot of legwork comparing what's for sale to what you have. Then you have to make an educated guess.
If you offer them on auction, eBay for instance, you will get hit for 20% so take that into consideration. If you can come up with a price you can sell them here for free. Selling stuff here is always my first option.
If you have some photo's you can post here in a discussion thread and ask about price before you post for sale.
Holsters are like coins and have a grading scale..condition, type, maker, color, rarity and on and on.
Not that hard to do ..the main thing is find out what you would be happy with in line with a market price. Then throw it out there and see what happens. If the price is fair you will sell.