I have a few of my painted tile trivets for sale on etsy (you can search for quiltzyx), but so far, my only customer has been my sister! lol Then again, I haven't really done much "merchandising" either. I have also bought some beads from one of the vendors there & she was a dream to buy from.
The fees are reasonable to post things - something like 30 cents for 90 days for each item. So it isn't too bad if you want to try it out. They have lots of tutorials & information on how to sell your stuff too...one of these days I will take the time to figure it all out! :D