I apologize for bumping an old thread but searched the FG335 and came up here. I just had mine re-tooled, restrung. My teenaged daughter decided she wanted to play so I dug mine old Yamaha out of the closet where it's been for probably 15 years so I could teach her. The guy at Grandmas Music told me it was in excellent condition, built like a tank, but needed some work, which he did for about $100.
I bought it in 1977 ... and I'll tell ya, with the saddle recut, the neck reset and the strings replaced it sounds as good as it did the day I bought it. I don't care that it's not worth much, it's still a beautiful instrument.