Oak green was never a rare colour, in fact I wolud say it was the most popular metallics next to Atlas grey back in the day! motor traders weren't over keen in putting them in stock, as with virtually everything else, green was the kiss of death on forecourts, unless it was a Mini, MG, Jaguar.. but back then it was all about Tornado, Mars, Atlas etc
In my opinion, Oak green is just a really nice shade of green that works really well with BB cars, and lots of black trim, take it up a level, with a drop and some RS's and it an instant hit! could it be that the Oak green cars are now a victim on their own sucess, and people are now looking further afield for rarer colours, just to be different... If so then Ed38 is where its going to happen first
Thom