Yeah, I'm with Videoman on that one, I don't think you can find anything cheaper than that on the net that's brand new. People here will tell you ebay, but I don't think you can get something new for that price from a reputable seller.
Plus they will charge you next to nothing for shipping and get it to you in 2 or 3 days.
Your light will use around 90kwh a month on 12/12.
250/1000 x 12 x 30 = 90