The $1400 price is a just a joke made up and bought up in the Judge Dredd club thread every so often.
It's just a joke about JD being cheap compared to other games of that era. It's not a serious estimate just a play on that joke.
I know of four people in Whitby who have a JD including myself. I like it a lot. GL with your search.
Not sure if your aware but there is a Durham region pinball group too.