How much can I get for these books?

I have the whole Twiligh saga, and the Short Second Life of Bree Tanner. I really want to sell them on cragslist or eBay. There's no writing and very few marks on any pages, and very few pages were folded over at one point. They're all from 2009, except Bree Tanner. I bought that the week it came out. How much do you think they're worth?