Are there decent guitars out there in the $100 price range? 12 year old DS has been wanting to try guitar -- acoustic guitar -- for a long time. Has not taken music before, other than piano, briefly, a few years ago. I'm not sure whether this will really turn out to be something long-term - would be great if he likes it and it does take - but I'm willing to get the guitar as his Xmas gift. It's really the only thing he's asking for.
My question -- would something affordable be possible, or would it be a low quality instrument that would only frustrate him and not really give him a chance to learn or enjoy playing?
Guitarists or parents of guitar players -- specific recommendations would be AWESOME.

Thanks for any help on this.