anyone use them for glasses/contacts/sunglasses

My wife recently broke my Revo sunglasses and I want to replace them with a current pair of Revos. The issue that I am having is that they are on the expensive side and the local sunglass/optician stores around here are unwilling to move on their price. Enter google search. Found www.framesdirect.com and their prices are at least $50.00 less for the same sunglasses...I get a little leary dealing with online retailers that I have had little or no dealings with in the past.

Has anyone else used this, or any other online retailer that I could find a $230 pair of Revo sunglasses for about $175?