Davidson's (in Arizona) is a large distributer. I don't know if they have a direct outlet, but I'm an FFL in Illinois and I am one of their customers.
For all guns distributed by Davidsons, they have a free additional lifetime warranty (in addition to the manufacturers warranty). So, if you purchase a new gun from an FFL that got it from Davidsons, that gun qualifies under this warranty. However, I think it may only be for the original purchaser.
I have noted that Davidson's prices are $5 to %15 higher than other distributers selling the identical item. However, when I purchase guns as an FFL Dealer, I have to talk into account the shipping costs - every distributer has a different policy on shipping and the associated charges.
Sales of new firearms are so competative that I (as a small dealer) can't mark up a new gun very much. Large dealers may get better pricing, or be able to order 20-30 guns on the same shiping charge, thus lowering the added shipping charge per gun.
And, some distributers have "special runs" made just for them. I know Davidsons had some 6" barreled Taures Judge with 2 1/2" Chambers - and I have not yet found another distributer with this model.
As a small dealer, I have almost ZERO overhead, and can order alsmost anything that a large dealer can. But they might get a slightly better price, better payment terms, and have the capital to order more guns at the same time. But the big guys have to mark it up more to pay for overhead.
So, the purchaser must "shop" around to find the model they want with the best price.