Newegg offers two Western Digital Red 4TB Serial ATA 6Gb/s 3.5" Internal Hard Drives, model no. WD40EFRX, for $279.98. (Add two to your cart.) Apply coupon code "PP2016BTS" and checkout via PayPal to drop the price to $254.98. With free shipping, that's the lowest total price we could find for two by $15. (For further comparison, we saw one for $135 shipped earlier today, still available.) It features a 64MB cache. Coupon expires August 1.