I am a beginner looking to buy my first bass and have decided to go the used route to get better value for the money. There is a late 90's Ibanez Soundgear I have my eye on right now that I really like. It is in almost perfect condition; electronics are all good, neck is good and straight, and there is hardly a scratch on it, but there is no room left on the truss rod for adjustment. Is this something that can be repaired for a reasonable price, and if so, will the repair be sustainable? In other words, is it worth buying?