I'd really like an LPG, but at £2k to get fitted that's a big investment on a 100k plus car, and would take me 2 or 3 years to get it to pay for itself.
In terms of buying an already LPG'd car, these seem to be £1500 dearer and i'd always be nervous about it.
TBH its not something I've ever looked into but I'll have a word with my workmate as he has never had a motor converted to LPG but knows what to look for when buying a car that has.What I'm saying is one that's done correctly to spec.