Newegg offers the Western Digital Red 4TB Serial ATA 6Gb/s 3.5" Internal Hard Drive, model no. WD40EFRX, for $159.99. Coupon code "EMCEGFH22" cuts it to $139.99. With free shipping, that's $3 under our December mention and the lowest total price we could find by $10. It features a 64MB cache.