LPG in reality makes little difference to the value of a car, you'd get abou £900 on a good day
If a car runs on LPG and greatly reduces fuel costs, why would that make little difference? I would pay more for a performance car that returned 50 mpg instead of 25mpg, sounds like common sense?
Not a lot of people want LPG, they take up huge amounts of the boot, make them much more impractical, you can't fold down seats and push things through.
Unless you got for smaller hidden tanks, then range is an issue. LPG enabled car will sell for about the same as standrd petrol, onces listed £1k above book are just kidding themselves.
I am only doing it as i want to reduce my £400 a month fuel bill, with a car i know and trust.
90% of people just buy a car that works, and don't want to have to fiddle with LPG settings every so often.
If i had to buy again, and needed to keep fuel costs down i would go the diesel route, and not LPG, as its just as economical.