na cossie price

Hi Guys,
I have the chance to purchase a second hand NA cossie engine out of a open wheeler race car.
It has 48mm Webers, dry sump and pump, forged pistons, open wheeler exhaust, Carillo type rods, standard crank and was dynoed some time ago at around 250 bhp, it revs to 8000 easily and the cams are quite mild so it wouldn't be too bad on the road car.
That's all the info I have, how much do you guys think would be a fair price keeping in mind it would probably need a freshen up.
cheers neil