Exclusively for Prime members, Amazon offers the MSI X99A GodLike Gaming Carbon LGA 2011-3 E-ATX Motherboard for $329.99 with free shipping. That's the lowest total price we could find by $228. (Most sellers charge over $550.) It supports Intel Core i7 processors and features DDR4 boost, five PCI-Express 3.0 x16 slots, two USB 3.1 ports, five USB 3.0 ports, an M.2 port, and 10 serial ATA 6Gb/s ports.