I found this cool site that you can use to get rid of your baby clothes as your baby outgrows it but also where you can get clothes for your little ones. I registered, checked it out and made sure it is a legit site before posting it. It is legit, and it works. BTW, sometimes you do find new clothes on the site, which is exciting. If you find a box you like you pay $5 plus the shipping cost. For shipping a box out you don't pay anything.
Check it out!