Watch eBay, you can get really good deals on them just watch for the ones who try to get you with their shipping mark ups..shipping shouldn't be more than like $6, maybe $7 at the most with the rates going up. Be patient and sooner or later you'll end up with a NWT (new with tag) pair for $10-12) with shipping that takes them up to like $16- $18, quite a deal when they go on sale at JCP they are $29.99.
Just remember to be patient and watch what you are buying.