If you can find a trusted luthier, it is possible that the checking on the back may be improved, or even cleared up with Quala-Renu, a lacquer re-amalgamator. It can work really well in some situations, but it is very dependent on the amount of checking, its depth, and the age of the lacquer. Remember, I said a TRUSTED luthier, the guy who did this doesn't qualify. I have seen it work, and work well in some cases, and not so well in others.
The only real alternative is to refinish the guitar, which is expensive (especially if you want the sunburst retained), or to sell the guitar.
The only real alternative is to refinish the guitar, which is expensive (especially if you want the sunburst retained), or to sell the guitar.