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. ;-)
Scepter Reviewed by Scepter on . WWW.INSIDESUN.COM ....! i orderrd a 400w hps referbished ballast... they sent me it all thrown in a box the frekin ballast has dirt on it but it seems to work...took 3 days to get it the day after i orderd the mh conversion bulb its been like 6-7 days and under my account it says awaiting shipment and it has for the last 5-6 days :( dono... Rating: 5