By pure chance I have just found the official Lola 1968 price list for the Lola T142 F500 car for 1969 delivery.
No VAT included , but £5,500 for the car plus Traco Chevy V-8.
it was, of course the "el cheapo " space frame one using T70 suspension and brakes but still , I think, a bargain back then.
I wonder what one is worth today?