This. If you pay more than £20 for a full set with all three pairs of lenses and an unused anti fog cloth all in a carry bag then you've paid over the odds.
You can get bullet ants for around the same price on ebay, very comfortable to wear, reasonable airflow with foam removed. Never used v12's so can't compare but ants are very good for the money.
From what I've gathered looking at shops + ebay, the regular civilian version costs crazy money (like £100+), but most of the ones on eBay are from the British army as they have union jacks which are unique to the military version.
I guess they get issued out, people don't use them and then sell them on eBay. That's what I reckon anyway