Never heard of a "Boss Scope" ....Generally on something like that you have an unknown quantity scope that is. The rifle is pretty desirable if your a eastern whitetail hunter and is probably worth I 'm guessing 350-400 but you are the dealmaker and its your own gun and your money . I would call a dealer or 2 and ask them what the book value on something like that is so you don't overpay. Make sure that the gun mechanically works trigger,safety ,slide and nothing funny about that and check out the magazine to make sure the lips aren't bent or nothing unusual or out of place. If the gun has a filthy bore that is not a bad sign but ask yourself why would anyone sell a gun with a filthy bore. I've been burnt like that before too and returned the piece to the seller. Hope that helps and good luck