There is also Century, J&G (One of my favs and close by), Bull Moose, Joe Salter, Empire (Hate his website), DK, Sarco, etc.
The Mosin Crate guy broke his rule the other day and did a first come first served sale. I was watching his video just a couple of minutes after receiving it and I immediately went to his website and everything was sold out. The thing about the Mosin Crate guy is he doesn’t buy large quantities. And what he buys is usually of a little higher quality. His prices do reflect it. I have purchased from him and what I received was pretty damn nice.
Just be aware that when you buy surplus arms, you really are taking a chance. I have purchased a lot over the years and when it comes to pistols, I have had some so-so luck. When it comes to rifles I have had nothing but good luck except from one company that purposely mis labeled a particular mauser I bought from them. If you are going to buy surplus, most places have a 24 or 48 hour return policy. So make sure you are ready to take it to the range and shoot it when it arrives and inspect it carefully before you shoot it. If you do not follow their return policy you could get stuck.
If you have not researched yet and found out about the Samco fiasco, you should Google it. Basically Samco bought a tremendous amount of surplus stuff. And basically went out of business. I forgot the exact reason for it going under. But a lot of people bought a lot of good and bad surplus when they were liquidated. One of the bad things were the Spanish Mausers. A lot of small time guys bought up large amounts of these Spanish Mausers only to find that maybe 1 in 10 were any good. Samco sold a lot of Spanish Mausers over the years that were not in very good shape. They rated them as good or very good when they were in actuality very poor condition. But they were sitting on a lot of them when they went under. Probably for that very reason. So a lot of people got stuck with these Mausers and because parts are impossible to find, have bought nothing more than a wall hanger. I collect Mausers so I know a little bit about them. I suggest you stay away from buying the Spanish and Chilean Mausers. At least until you get familiar with buying surplus rifles.
One more suggestion. If you don’t reload and you want to shoot your surplus guns, make sure the ammo is still made and readily available before you buy the firearm. Also, make sure you can afford the ammo. Even if you do reload, make sure you can get or make the necessary components for your firearm if you want to shoot them. A lot of times a surplus firearm is cheap because the owner is having a hard time getting rid of it because there is no ammo or components for it. If you are resourceful in making your own ammo components, you can pick up some pretty rare surplus firearms this way and still be able to shoot them. Otherwise you are again only buying a nice wall hanger.