As you’ve probably heard, Volkswagen is shelling out nearly $15 billion in a class-action settlement tied to the Dieselgate fiasco. A lot of the money will go towards compensating owners of the offending vehicles, including buybacks and sizable cash payouts. In fact, VW is handing out up to $10,000 on top of the vehicle’s pre-Dieselgate value. And while dealers put a stop-sale on cheating diesels when the story broke last September, the un-clean autos are still available on the used market. But before you rush out and pick up a bunch of old TDI’s in the hopes of making a profit through buybacks, there’s one caveat you should probably know about.