I think they are going to hit a ceiling, I don't agree with Mickey S. everything has a price and what people are prepared to pay. You see Twincams and RS1600s advertised for mega bucks but unless they have a racing/rallying history they don't sell and keep on being advertised. I sold an Escort Twincam 2 years ago and I didn't get £40 grand for it!! Saying that if you can get a good RS for reasonable money it's still probably a better investment than leaving money in the bank with no interest rate!!