Basic things you can do yourself:
Clean up the wood, using a mild cleaner like olive oil, remove any surface rust with gun oil and 0000 steel wool, being careful not to remove color.
Sell as-is, put real money into it only if you intend to keep it.
DO NOT do any of the half arse things that others do on the internet like Cold Blue, torch colors, etc. It will only reduce its market price as to someone who knows these guns will have to have those things reversed during a restoration.
It being a 20 or 16ga, as well as an ejector gun will make it desirable to many people.
Last edited by Ken61; 12/07/16 04:06 PM.