I still recommend an initial trip round www.frets.com as I blickied above as it will quickly point you to some of the obvious things to look for. My guess, from the information presented but without seeing the guitar, is still a change in intonation caused by wear of the saddle (plastic strip) and/or nut, either of which is easily fixed.
I would always repair a guitar of personal value to the player, whether a "famous name" or not. I have just sold my €2000 handbuilt guitar as my €500 Korean-made archtop acoustic both sounds better to me and is more versatile for what I do. Same recently with a very expensive mandolin which I sold (after 21 years owning and playing it nearly every day) and bought a relatively inexpensive model from a new young maker which is better in almost every respect. "Name" doesn't necessarily equate to a good sound or value to the owner.