OK, I need some advice.

My old man is flogging his classic Cooper. It's had the Rallye arches added, along with new filters and exhaust so it's blooming loud!

It's an L reg with approx 77K on the clock. It's in fairly decent condition, needs a wee bit of work to get it through MOT (some welding and new brakes).

What sort of money is this worth?

Oh, and before anyone offers, I'm first in the queue!