Board Thread:Game Discussion/@comment-34609328-20180505151318/@comment-26829117-20180506090938

The 2015 and 2016 NASCAR cars were all originally winnable for free and R$ upgrades so you might get some sort of offer at some point on them (maybe FM will introduce multicar flashbacks at some point) but the 2017 cars needed gold upgrades (and the TOYOTA CAMRY (JOE GIBBS RACING - 2017) is special).

Personally, now they are in the new Motorsports category, I would think you could easily ignore them until you either have plenty of spare gold (shouldn't take long with a gold income of 4000 per month) or they are the last cars left in the game.