You won't get any more than $450 - $500 selling it outright on a trader board or auction. You could part the Kobra and the K-Var stock set and maybe get close to what you have in them. That would free up some cash for your AR projects. Having done that, IIWM, I would hang on to the SAR and whatever ammo and mags, because you are out the cost of the refinishing. At a gun show you would be competing with the $299 guns, and it would be hard to get $350 / $375 or more with tables of $299 SARs all about. In the closet, it is not costing you, and you may rekindle the love affair later, or you could sell it in the hysteria after the next terrorist attack. If you do take a shine to it again, Kobras and polymer stocks you can always get again.
If you consider parting out the stock set and Kobra, I know a guy who might be interested, depending on the model of Kobra and the type of stock. When you decide, e-mail me.
Noah