Gas in England and Germany is between $5 and $6. The difference between that and what AAFES gas coupons cost can be attributed to taxes.
Nope. AAFES puts a pretty heavy profit premium on top of the regular gas price to arrive at the price they charge for gas coupons. The real gas prices are a LOT less than what the coupons cost, but people rarely complain because the alternative is even more expensive.