Electric Pig and other sources have confirmed to us that Apple is giving back the $100 price difference between prices last week and today on recently purchased iPads. In the US, Apple dropped prices at least $100 so it is a healthy chunk of change. The window is 14 days or February 16th (or thereabouts).
Also, as of yesterday, Apple has new significantly lower prices on refurbished iPads
FTC: We use income earning auto affiliate links. More.