I found a great used Sunlight Systems (one of the best brands out there) 430W HPS light that included ballast, hood, cords, and used Hortilux bulb for $120. Just look on craigslist under farm and garden.

I also own a 12 year old 175W MH with a 150W HPS conversion bulb. Will grow a very small but adequate plant up to 3 ft tall - max 2 ft x 2 ft area - IMO...