Not sure what to ask for this...new ones are $769AUD on the CAPA Performance website:
http://www.capa.com.au/fuel_regulators.htm
I used for a couple years on our supercharged 240, but with the current project I won’t be using it as I’ll be using turbo computers and injectors instead. Not sure if there’s any demand for it here - may need to advertise on other forums. Anyone interested? I’d start around the $500 asking price, but that may be out of line (open to offers). I paid $700 for it IIRC. Comes with various springs and discs to adjust pressure and rate rise.