Newegg offers the Western Digital Purple 2TB Serial ATA 6Gb/s 3.5" Hard Drive, model no. WD20PURX, for $87.99. Coupon code "ESCARKA29" cuts it to $79.99. With free shipping, that's the lowest total price we could find by $8. It is designed to work with up to 32 HD security cameras. Deal ends April 14.