My ls400 has lpg, I've had it converted myself back in 2018, and had the cambelt and waterpump replaced in 2020, bought the parts myself from lexus and had my local trustworthy garage do the work without any issues
I'm in the Midlands and had the work done at a garage called the mechanic in ward end, but lex tek in Sheffield can do the work too.
If I was to sell it, I'd rather sell it to an enthusiast, because I know he/she will look after it like I have, but if your interested, do let me know, knowing my luck, the gs460 will be sold, and in that case, I'd keep it
To be honest, I only wanted to sell it to buy the Gs460, but I drove the ls400 I think last week and it still put a smile on my face, so I'm not sure now lol
https://www.ebay.co.uk/itm/166432822884?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=aevtpsrft0q&sssrc=4429486&ssuid=lPxTwaCNSPe&var=&widget_ver=artemis&media=COPY
Mine must be worth 20k then