I would be wary of 1000bulbs.com if you plan to buy lamps to use. Collecting is fine to use them, which can sell other brands other than the big three.
I wouldn't buy there any ways, they kill you on the shipping outside of the US. But if they didn't send me the lamp I ordered I would ask for a refund.
Oh, shipping to me is like $10 on average. They sure know how to pack though. The box for my new 175w MH ballast kit and lamp was smashed in, so I thought "uh-oh". But when i opened it up, the lamp's box was in perfect condition as well as the lamp itself.
These were replaced with LED PAR and R40 without bypassing the ballasts. Needless to say it fried the LED driver in the lamp. They then complain that the lights still don't work.