Sign up for thredup http://www.thredup.com/r/TW9S0O
and you will be credited $15 to use on your first purchase. It has been said that you need to click around a little bit before the account is credited.
USE PROMO CODE SAVE20 AT CHECKOUT FOR 20% OFF YOUR ORDER.
Standard shipping is $2.99 for the 1st item and $0.99 for each additional item; If your order amounts to $50 or above, standard shipping is FREE.
With this credit you can score some free clothing!
Edit
NVM, it just applied the credit after clicking around. 3 tops for just 2.99 shipping, thanks for this