Google it. eBay started taking fees from shipping. Many threads about this and people super pissed that eBay takes money from them on shipping charges too.The guys that charge that much for shipping on Ebay are only charging $500 for the kit. As Ebay charges the seller based on the item sell price and not how much shipping is, they make the money on the shipping and nothing on the actual kit.
Most of these guys are in China and it costs more than you think to ship a fairing kit half way around the world.