I saw it quoted as Â£90 for one round for a Chieftain once, but that was when I was at school and I am now coming up for retirement... At the time you could buy a brand new typical family car for around Â£1000.
I thought that Chally 2 fired CHARM 1 & 3, HESH and smoke? Seem to remember reading that somewhere. I don't know for sure 'cause I was on Cheiftain and CVR's. It's a shame if they don't fire APFSDS rounds as new tank gunners will no longer be able to learn the mysterious martial art of 'Fin Tan Kon'...
Take the US price, double it and add a fair chunk. Our arty rounds cost between 600 and 1,700 per shot (5 years ago). The cheapest being HE (price does not include fuses), most expensive was bomblet.
The yank versions cost 30 quid for HE and up to 800 dollars (500 quid) per Bomblet. Difference in price is caused by 3 main factors:
1. Quality. Brit rounds are made to much finer tolerances than US munitions, hence are much more accurate.
2. Quantity. Brit Army will order a few thousand rounds a time, the US orders in several million.
3. Brit procurement process is still cr@p and you get ripped off.
But someone out there must know how much these little bangs cost: when I was with 22 (Sheepshagger)RA we wished that we could swap our annual missile (no plural) for a porche; British Waste-of-Space delighted in telling us that they were 79,000 pounds a throw. How we laughed when one launcher went mad and launched all 8 in three seconds vertically into the sky, never to be seen again.
A few years ago, I recall that we were buying the CHARM 3 training round to replace the DS/T round which was wasting out. A figure of Â£3k was mentioned and I think that was the effective cost of each new training round. The CHARM 3 round would be much more expensive, IMHO, mainly because of the materials used and the required accuracy of machining.
On the one hand, I agree these things can be very expensive. On the other, a good hit with a CHARM 3 round will take out any armoured vehicle - so even Â£30k would be cheap.