Avalon is another Buy Sell Trade place I found while walking the streets of Pittsburgh. They had a very similar setup as Buffalo Exchange but I found more high end stuff like Marc Jacobs and Prada.
Check them out!
This one was located on.
680 Washington Rd.
Pittsburgh, PA 15228
I did find out later that there are more located in Pittsburgh and some in Ohio and Missouri. Also check out there sister store located outside of DC called Reddz Trading.