Right.... but you also didn't list the brand or ballast type. I made the assumption (maybe wrong) that it's likely the equivalent of an HTG Supply 400 w HPS. If I'm wrong, then mea culpa and maybe you could tell the lookie loos what brand and type the ballast is and what brand and type of reflector so they know what they would be buying.
Now if it is HTG equiv. and you are asking $360.00 then you are asking too much. If you paid too much... then why try to make another RIUer also pay too much? Better to just return it and get your money back