Typically refurbished gear has been completely gone through, and check to insure everything works correctly. Questions will remain about the absolute quality, but it should be a safe gamble.
Are refurbished Infocus projectors a good deal?
I'm about to buy (on ebay) a refurbished Screenplay 4805, and I wanted advice before I buy: will the refurb be "as good as new", is a 90 day warranty good for a refurb, is it better to get the refurb directly from Infocus rather than from a private seller, etc. Thanks, Ben