In 2006, a spesh langster costs £350. Last year it was £575 though this year I think it's gone down to £550.
A bottom range Allez with Sora crank, tiagra re, and mix of other components costs £500 for the double chainring, or £530 for the triple chainring model. Today the equivalent spec Allez is £725 (tiagra). The circa-£500 model has 2300.
As an aside, in 1987 a new Porsche 911 Carrera cost £37000. Today it costs almost £80k. And a used Ferrari F430 jumped up in value by £15000 when prices of the newer 458 were released and people realized the new model is £180k as opposed to to previous model's £130k. A VW Golf GTI was £12000, today it's around £25k.
The other day I was at a showroom sitting in a Toyota Yaris and the saleslady walked past asking if I wanted some help. I asked how much the car is. I was thinking it's like £12k since it's a nice model. She told me £18k. For a Toyota Yaris!!!
Don't even talk to me about yachts.