For me a Good deal with code 36 with 70+ hours would be under $6k. If the bike has really low hours I would pay a little more because you could swap the good battery from your other bike that has more time on the chassis. Currently a mxr with low hours and no codes is worth about $10k
With code 36 you can still ride the bike and you can see if @Mark911 could repair the bad wire bond. Not sure what the cost to repair is.
I can certainly fix the wire bond, cost depends on what you give me, either the whole pack or just the one bad module. A couple wire bonds would be $300 max at the pack level and half that with the module. Make sure there aren't any other codes or symptoms.