American/European phone companies
Normally we Europeans feel we are being price-gouged rather more than Americans. But at least in one area it seems to be reversed: telephone companies.
When I phone American, it's normally me calling, because of this difference. So I was called by a friend who asked me to call back. Because of some confusion, we then called each other at the same time, and both picked up without the phone having rung, very confusing. Against my better judgment, I decided it had been me calling her, very normal, so we chatted on, for over an hour.
But now it turns out it was actually her calling me, and here comes the biter: instead of the less than five dollars that normally costs me, she was charged for $215! (We probably have no grounds for challenging it, so I'll pay it, since I was supposed to make sure I was the one calling.)