I have seen this kind of problem during my 25 years of experience on the field and most of the times it was about restoring very old instruments like this 1926 Francisco Simplicio guitar:
Of course the guitar can be fixed but it’s an experts job because it’s a very complex repair and it will alter the original sound the guitar had before.
Sound depends -at least- up to a 75% on the bracings “abanicos”. In case you haven’t seen them here is a picture that shows the inner structure of the guitar:
Bracings are of paramount importance as I explained in the following article:
and if those bracings are dis-glued it’s a big problem because the repair man will have to either glue them again or remove the original ones and change them for new bracings. This will modify totally the way the guitar was supposed to sound. Luckily in 20 years as a guitar player that kind of problem never has happened to me.
I guess the previous owner did not take care of humidity levels and/or stroke the guitar in a way that the top inner bracing was damaged.
If you can’t buy a new guitar then it may be a good idea to buy a second hand guitar provided you make sure that the instrument isn’t damaged. But how will you know it?
Certainly by looking at a picture you can’t tell that, therefore you need to:
1) Get assurance from a trusted person that the guitar is in good condition.
2) Verify it yourself personally (if you know how)
In case you need it I do know one person that can successfully perform that repair, he is one of the major disciples of master luthier Arcangel Fernandez his name is Leonardo Plattner and here is the link to his website:
(at the bottom of the page you can read it all in English)
In conclusion, if you take care of the appropriate humidity levels and play your guitar carefully I can assure that you will be freed from that predicament forever.
Please take a look to the simplest way to control humidity levels that I explained in a former issue of the E-zine: