Cheapest HID

I was wondering if anyone could point me in the direction to find the cheapest HID grow light. Ive thought about buying one that is used for recessed can lighting in a store. Im looking to get something 400W or lower, preferably HPS. Thanks in advance

HTG Supply and Amazon.com both have excellent prices on entry level HPS systems.

check out hightechgardensupply htg- they are the wal-mart of grow shops