I am so fortunate to have stumbled upon this great site selling guitars, primarily acoustic, but a few other string varieties, because they have a great guitar player showcasing each with a video along with high definition photos of the guitar. There are boutique Luthers as well as larger builders like Martin and Collings. Most I believe are pre owned. I think it is a great recource. Enjoy.

http://www.dreamguitars.com/instruments.php?size=