Look bro.. stop looking on ebay because a lot of their cheap fixtures of Oddysea.. and those are the ones the were known to start fires. They've stepped up their game since.. and use electronic ballasts instead of magnetic ones which were the main cause of the fires. Still.. i don't trust them.
This site has ridiculously cheap metal halides, which i bought from, and i haven't heard a single complaint about these people. Everyone says their lights are quality and they last a heck of a long time. Only thing that i've heard recently.. is that the ballasts last maybe a year, year and a half. But that's still a good amount of time considering you get the light fixture.. bulb, and ballasts all for 150$. These people are NOT Oddysea. These guys make excellent quality lights.