Your question is going to depend on a few pieces of missing information. First, how much do you have tied up in it all. Second, are you needing to get out from under it, break even, or make a profit? You don't necessarily have to tell us how much you have into it persay, but these are the questions you need to ask yourself.
Impact guns sells the plain jane 11707 for $1629. http://www.impactguns.com/store/650350117073.html Then, you can get a C-stock from a member here for around $400 and the other stock is available from time to time on here and GB for around $200. Add the extension in and you are looking at maybe $2500 invested in what you have. The case may, or may not, be something important to a prospective buyer.
So who knows? It really depends on what you want to ask for it and what someone is willing to pay.
"Pain or damage don't end the world. Or despair, or ____ing beatings. The world ends when you're dead. Until then, you got more punishment in store. Stand it like a man.........and give some back."