I'm interested in buying a late model Jetta TDI wagon. I have found several in my area that seem to be reasonably priced, $6,000 to $9,000 for 2012 to 2015 model years with 50K to 120K miles. My concern is buying one that might fail future emission tests and might need a lot of money to get it emissions compliant. Or, buying one that VW has already paid the owner settlement money, or buying one that VW has fixed and made emissions compliant, or buying one that is supposed to have been disposed of etc. Should I consider a used TDI, or run far away?