You get what you pay for...
I ordered a 1000w MH from Inside Sun and it also arrived within 3 days, the packaging wasn't great and the refurbished ballast looked like an industrial security lighting ballast, it was also a little dusty.
But the damned thing has been humming along for over a year now with no problems whatsoever.

I paid $110.00 for the complete setup, ballast, bulb and reflector.
All in all it was a good deal, if you can afford new, you should buy new, but overall I'm very pleased with the transaction....It was all I could afford at the time. ;-)