You did good on the price. You are also free to do as you wish with your model 25. If that scratch is what it appears to be across the cylinder, the only way you are getting rid of that, is with a polish and refinish.

What I would do personally, is this.

1. I would buy a shorter barrel.
2. I would look for a second cylinder.

This gives you the option of selling the longer barrel to get back a little of your cost, and secondly saves you the cost of a refinish. Provided the second cylinder somewhat matches the original gun's finish.