Another often overlooked route is to advertise on local FOR SALE websites that allow the posting of firearm sales. I have on occasion posted Wanted-to-Buy (WTB) listings on local for sale sites with excellent success. You'd also be surprised as to what comes out of the woodwork. I met a young man, after posting a WTB, who had a sporterized Krag and was asking $120 for the gun. It was basically a parts gun except that I noticed that the rear sight was a 1901 carbine sight! I offered to purchase the the Krag, however, the fellow fessed up that he was feeling guilty about the sale because he had taken the Krag, which belonged to his girl friend, without permission...I never heard from him again.
