Carburetor Question - Is this a good call?

In my humble opinion, unless you are competent at carb rebuilding, I would buy a new one. They are not that expensive, and Edelbrock carbs run great out of the box and are easy to tune. I realize carbs are not terribly hard to rebuild, but if you aren't comfortable doing it, buy a new one. Also, I would think twice about buying a used one unless you totally trust the seller.