T.W.
I am not sure where an adult consignment store is but I know they are around. There are also many children's consignment stores around that give you the option of cash in hand or trade. My favorite consignment store is in Aurora on Mexico and Chambers called Kidz n Things. The only problem you might have is the time of year, they don't typically take winter clothes in the summer.
Good luck!
P.S. You might also see if Avon Breast Cancer has a program that takes clothes.