Not trying to stear you away....but the last time I sold clothes on ebay (DW's hardly used name brand jeans), I had included a fixed amount for shipping of $5 (I think) and when it was all through and done - after eBay fees, listing fees and postage (not to mention the time to photograph and list it correctly) - it only cost me a $1.75 to sell them on eBay
(uhhh....that's NET - after subtracting expenses from the sale price)....was gonna make it up on volume, but decided that CHKD needed our stuff more
I HAVE found that most other household items can and DO sell SUPRISINGLY well.....just NOT clothing....at least not for me!
Good luck with your efforts and please let us know how it all goes for you!!