First, in MOST states, you can sell to another resident of the same state without being a FFL. But you did not tell us what state you are in. If you are transferring ownership across a state line, it must go TO a FFL. You do not need to BE a FFL.
You can put them up for sale in the classified section here, or on gunbroker.com, auctionarms,com, gunsamerica.com, etc.
Craig's list and ebay do not permit sale of guns.
You can also find a local gun shop that will take them on consignment. They sell them for you for an agreed amount.
Or, since they are in your way, you could just send them to me for free. I will use them, enjoy them, and never sell them to a wholesaler. Would not do this for everyone, but like to help out new folks.