I really love my 2011 15 inch unibody macbook pro because it was so far the first quad core laptop apple release therefore the best for photographers. I took care of it very well, and when rmbp was release I was stun with the ratina display resolution. So I though If I sell my current macbook pro the value will decrease like used windows pc. I am waiting to buy 13 inch ratina display macbook pro that's my goal InshAllah. 
