The black limbs will actually(my opinion here) probably look pretty dang good. I really like the black/camo look. Anyways, the reason they do that is bc when the mass produce a bow, they can't keep producing limbs forever for it. They will build a large overhead of the cheapest sets they can for warranty repair situations like yours.

Cost: not much if anything on the limbs. I'd say less than 30 especially if u get the new string. A new strin will cost u anywhere between 40-100$ tho depending on what brand etc. 30$ ish to install, tune, and reset your loop ad peep. I'd say to expect around 100$ depending on the shop for everything.