You can see why the AC 428 at approximately 20% more new than an Aston Martin in the late 1960's struggled to sell in higher volume in addition to the well documented development and production delays. Although the skilled labour is rarer these days, a lot more work could feasibly be done by modern machinery with modern materials which might balance out production costs. I guess if you compare with the current entry level DB9 series Aston at circa £ 130,000 the AC if they built a modern equivalent to the 428 would be about £ 155,000 today, probably too expensive to sell in viable quantities, especially if it still used a 'bought in' high performance engine. The most expensive Frua that I know of that has actually sold was the Convertible CF12 advertised at £ 175,000 for about a year which had gradually gone up in asking price over a period of 3 to 4 years as it passed through various auction and dealer's hands. Although advertised at that figure we do not know what it actually sold for of course or if part exchanges were involved as that is between the dealer concerned and whoever bought it