why do I see all these 740’s being sold so cheap on ebay but not the 760a? doesn’t the 740 have faster cd burning anyway? there aren’t any refurbished units of the 760a out there?

I don’t think the 760A has been out long enough for that.

As this is a rebranded Benq drive (DW 1640), nobody would pay more for that “Plex” than for the Benq model.