Well, they wholesale for $18 each, and I don't think you'll find anyone selling them way below retail which is $36. What size do you wear? If it's not a common size you may be better able to get a deal.
I actually have 2 that are used, but, still in good shape in size 34DD. White, softcup, seamless. you can PM me or email me at [email protected] My ebay username is the same as here and I have feedback on diaperpin under the same username.