the issue of a loose piece of solder or Flux ratteling in a rib would not bother me in the least as long as they were good. There are plenty of Guns around that don't have a loose piece of junk broke loose. return that one as you will hear it every time you use the gun. It may never need a strip and relay,rebluing job and someone else can enjoy that gun. The last strip relay and Damascus refinish I had done was on a set of 34 inch 8 bore bbls I think it was around 800 bucks.