I just received my Asus r9 270x, upon arrival I discovered that it doesn't fit inside if my small ATX mid tower. If I return it to newegg, where I bought it, they will give me $186 for it, and I have to pay return shipping of about $15. After looking around on eBay I thought it might be a better idea to just sell it on there. Which option would get me the most money in return?