I'd hardly call someone who would pay $190 for a fax modem a mug... just convert that into USD/GBP or some currency that has less numbers in it than HK.
"They charged me 14 quid for a fax modem, man, they really ripped me off" just sounds kind of petty. Many people value their time and couldn't be arsed spending an hour comparison shopping in a heaving mall to save the cost of a Happy Meal.
On the other hand, I would call someone who paid for a fax modem stuck in the nineties. It's like going shopping for IDE drives and ribbon cables.