Talk:RR3 Wiki:List of Sales so Far/@comment-25061457-20151214065129/@comment-26338036-20151214114819

This is not a one time offer. I already owned the car before, but I just checked in the constructors menu -> Lamborghini, and the offer still shows up.

So completing Stage 5 of Ride the Storm seems to be a pre-requisite, but after that it is not a one time offer.