I'd spend a little time to see if your state or local area has any firearms associations that offer classified ads. I have a site that I check a few times a day and have made numerous trades and purchases. Military stuff usually sells pretty fast unless it is way overpriced. I've gotten rid of a few commercial rifles that way and got military stuff in exchange. I guess part of it depends on the laws of your state. PA has unrestricted sale of long guns between state residents which is a plus.