Thumb Score: +20 Amazon [amazon.com] has Thermaltake GF1 850W Fully Modular 80 Plus Gold ATX Power Supply for $79.95. Shipping is free. Best Buy [bestbuy.com] has Thermaltake GF1 850W Fully Modular 80 Plus Gold ATX Power Supply (PS-TPD-0850FNFAGU-P) for $79.99. Shipping is free or select free store pickup where stock permits.