Ellyjonezz,
While selling old parts to help the widows of a couple old gunsmith friends, I had to listen to the excuse for low price offers from more than one dealer. It seems they think it is pretty costly to identify individual parts, store them for many years until someone finally needs one, then locate it and mail it out to the customer. Also, many times a particular part will fail on all of a particular model gun, leaving the parts dealer with no inventory of the required part and piles of parts that are never likely to be sold. Often, just the postage is more than the customer wants to pay for a part. It didn't take long to disabuse me of the Idea of going into the gun parts business.
Mike