From the factory, with a warranty, I probably would not have a problem with it, as long as it was not my main commercial projector. If you have something else to use too, why not save a little $$.
Although I have no experience with referb projectors, so take it with a grain of salt. I save some $$ by buying new, old stock. My projector is a great piece, but was going out-of-production. So there is newer tech out there, but mine was about 1/2 price for a brand new unit. Just keep searching, you will find something that is in your budget and spec range.
-- Neil --