Ebay is always a crap shoot !! Its like rolling dice to see if anything will sell !! But it does have more traffic than any of the online sites !! Sets rarely sell on ebay because if the shipping charges !! And you usually find that people are only looking for one ot two specific pieces to complete what they already have !! Art pottery is a little better but still slow !! Go to the category you will be listing in and check to see what is moving (sold prices or those with bids) !! Craigslist is widely read and you would have no expense to sell !! If you live in a smaller town then go to the next large town within driving distance !! Your listing will still show in the smaller areas !! Good description and pics will help your sale !!
Good luck !!