Thumb Score: +19 Best Buy via eBay has Corsair RMX Series 850W ATX12V 80+ Gold Modular Power Supply (CP-9020180-NA) on sale for $114.99 (price displayed when added to cart). Shipping is free. Amazon also has Corsair RMX Series RM850x 850W 80+ Gold Certified Fully Modular Power Supply (CP-9020180-NA) for $114.99.