This post is a little off topic. One of the things that Karin misses on our little island is a second hand shop or charity shop as they are known in the U.K. One of our usual stops when we go to Athens is the extensive flea market at Monistiraki.
The best shops in the USA for used merchandise are called Goodwill. They now have extensive new and used products that you can browse online. Unfortunately they only ship within the USA, but shipping costs are a flat rate, so quite reasonable if you choose more than one item.
Take a look; its fun!