Free: Contests & Raffles.
You typically can do better selling privately then through a store, $$'s wise. FFL check fee required either way
Some of the best deals I've gotten were someone bringing in a gun to trade or sell, to the place they purchased the gun originally, and the place offered them 50% of their purchase price. Made them offer on their way out and made a screaming deal.
Ive never done this but with transfer laws as they are it seems like it would be a lot easier to work with a gun store or Cabelas rather than selling or trading with private parties. Anyone have any experience with this route, recommendations, which stores to avoid, etc. ?