It is your responsibility to be in compliance with all Federal, state, and local laws when using this site, selling firearms, purchasing firearms, and transferring ownership of a firearm.
To find an FFL in your area that can take receipt of a firearm for you, look over the FFLs listed on Gun List USA.
Some like to use a bill of sale when making a face to face transaction...when allowed by the law. Here are a few examples:
To help determine the value of a firearm, try these resources: