Extra Manga

I currently have some extra manga that I bought without realizing that I had made the same exact purchase a few months earlier. Unfortunately, I can't return them to Border's becuase it's been over 60 days since I bought them. So, now I have three random volumes of different series' to get rid of - what do you think the best way to unload them would be? I've never re-sold anything on the internet or done a book exchange, so any advice anyone can give on the best way to resell them would be greatly appreciated.

The books are as follows:

Monkey High! Vol. 3 - Brand new condition, never been read.

S.A. Special A Vol. 7 - Brand new condition, never been read.

d.Gray-man Vol. 12 - Like-new condition, flipped through it once.