I would suggest posting pictures and letting some of the gunsmiths who post on here evaluate the damage.

I had a little bit of damage to the exterior of the barrel at the breach end on a BLNE I owned and was contemplating having it welded up. The cost of the repairs (welding and rebrowning) exceeded the value of the gun and folks on here told me not to bother with it, rightly in retrospect. I later sold that gun for $900. I would imagine based on your description that your situation is similar i.e. it is not worth the cost of repairing unless it has some other value to you.

Here is a pic:

[Linked Image from i.imgur.com]