How much is an LPG Conversion kit worth?
 

I've got a 7 series 728, with an LPG conversion kit i'm stripping the LPG kit out and selling it on but i want an idea what you guys think its worth?

It's professionally fitted, and a decent make, the tanks made my Stako, and the injection systems by Romano..seems a quality piece of kit and i'm not certain but i think it will work on the majority of 6cyl engines..

ideas on what its worth?

Here in the United States it would be worth it's weight in gold. I had an Alfa Romeo with one of these systems when I lived in Europe. The car ran fine and it was switchable, you could run regular gas and use the LPG as a backup or reserve. Not to mention, aside from being less expensive, it's supposed to run much cleaner than petrol. The only downside was that there was a slight decrease in power, but for a commuter vehicle it was the perfect solution to the rising fuel costs. You should hold onto it until you get another ti.

Not much really. Is it a sequential injection one?
Since it needs to be fitted by an LPGA member (or at least checked by one of them), it's very difficult as e.g. the tank will only have a certificate for a certain time etc.
Why are you removing it from the car?