I'm new to the RR3.  I've only been playing for a month or so.  I'm working my way through the career and I currently have a special offer for the Aston Martin Vanquish,but I'm not up to the Aston Martin series.  Is there a way to buy this car now?  When I tried it just says it is locked.  It doesn't really make sense to offer cars to me if I can't buy them.  So I'm assuming that I'm doing something wrong.

Thanks,

Paul