The bottom couple are PCI expansion ports, or riser ports, which allow as the name implies allow you to add additional cards to a motherboard. I've never sold them, but a quick search on ebay did show they do sell, just depending on the model of course. With the ports on the back of that motherboard being bent, I'm not sure you would be able to get more then scrap value on it, but I suggest googling or checking ebay. There should be a sticker with the model number of the motherboard on it, or it might be imprinted on the board itself.