Yes the introduction of the special's for the Aero 8 plus a general increase in the collectors cars recently has bought a little additional premium it would appear.
As we have all remarked the price of early Sierra Cosworths, Escorts and other stuff has taken a big bump. As for the price of 911's !
Also the increase in cost of medium business cars like the 3 Series and quality hatchbacks has seen a bump in recent years. A good hatchback is now £20-25k. The new Volvo V40 first edition/RR Evoque easily hit £40k. These are not large cars. When I bought (leased) the AMG E estate it was £67k and now the new model is £81k minimum.
I think I might start stocking up on Aeros