Newegg offers the Western Digital Purple 4TB SATA 6Gb/s Surveillance Internal Hard Drive, model no. WD40PURX, for $173.99. Coupon code "ESCATNP27" drops it to $151.99. With free shipping, that's $3 under last month's mention and the lowest total price we could find by $13. Designed for surveillance recording, this bare 3.5" drive supports up to 32 HD cameras. Deal ends June 27.