it's an MPM british racing green P stock.
Price wise i have no idea as I have shed loads of them .
for the right person who is wanting to finish off a mag or a cocker, then this could be worth more to them.
To someone I guess it would, I wouldn't give you more than a fiver for it though.
I'm the worst person for knowing the value of shiz though, I either sell cheap or get it given to me.