This KGuard All-in-One Security System drops from $299.99 to $179.99 and then to $159.99 using the coupon code CAG100906 at Tiger Direct. As a bonus, use this $40 Mail-in Rebate to drop the total net price of this system to $119.99. Shipping adds around $9. This is the best price we could find for one of these systems by $70. It comes with 4 weatherproof, day/night vision cameras, a DVR with a 500GB hard drive, mouse and remote. There is no sales tax (except FL, IL, NC, TX, GA, SD and ID).