Rob, If you live in CA, then make sure you can sell them to Cabelas as a non-resident. Since we don't have any Cabelas in CA, I'm assuming you're talking about the Reno store. I have no idea if it's an issue or not, but you should check.
Selling in CA is really no big deal. Pretty hassle free. Post them on Calguns.org in the classifieds section if you want the largest audience. Other good sites to post are 24hr campfire and Jessie's Outdoors. Lots of CA people. Then just meet the buyers at a gun shop in your area. Paperwork takes 5 minutes. The FFL process is simple and you can have the buyer pay the fees. GunBroker as others have mentioned is good, for selling and researching price history. You could ship the guns, but you would need to get payment first and then ship it to an FFL (in state or out of state). Buyer pays shipping fees. That means you would need find good boxes for them, which is a pain. Doing it in person is a lot easier. If you're in the Bay Area there are plenty of shops that buy used guns, but like Cabelas they will only give you 60% of the value since they need to make money on the resale. Let me know if you have any questions.