Why not mention something about highend petrol car prices too?
Like the BMW / mercs/ Audi / Porche/ Jag's...they are all available at pretty attractive prices these days.
Still they won't be cheap. Also, many buyers who buy these are those who use it on daily basis, hence diesel will be preferred & issue is not just being economical but is easy to get one too especially if you do inter-city driving.
Ofcourse, if one wants to buy just to flaunt & 90% times the car will be in parking, then its OK, but then I hate fake.
And if you see, 2 yrs back, the ratio of Diesel:Petrol in case of Merc was 60:40. From 2011 onwards, it is 90:10 !! Which means finding new Merc in petrol is difficult.
You can still get something in Jag, but forget about XJ.
BTW, try to find 2007-08 BMW 3 series petrol. You may get it at price of base Laura.