I'm not an expert, but if you plan to replace all that, I would think you might be able to find something cheaper. One of the mail-order distributors recently had Romanian SKSs with cracked stocks for pretty cheap ($120?). If you plan to buy a well-worn rifle and replace the stock anyway, I'd probably try to find a better deal. Otherwise, I'd probably shop around and try to find a nicer SKS that doesn't need so many parts replaced. If its that worn, I'd guess the barrel won't be much good, so why bother. I recently purchased two new SKSs (an original Russian and a Norinko Paratrooper) both for $500 (on sale). They were in virtually perfect condition, in original boxes, with accessories.
Doug