The cost of a shirt simply isn't the cost to produce it. To establish a brand, and especially a worldwide brand cost billions (on top of billions of dollars of operating costs every year). Then there are the retailers working on a margin of one, two or three times the the cost. My local designer store works on a factor of 2.8. So a £100 item sells for £280.
What's the difference between a £50K BMW and a £20,000 top of the range Toyota? Not much these days apart from the badge. A badge is what you are buying in any luxury goods market. You can't make a badge, you have to build one and that goes back to what I said above.
It's not down the the manufacturers to curb fakes entering the market, it is down to the pikey consumers. The same with stolen goods. Without buyers there is no market.
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Didley Squat now in stock. Going to be a FAST mover!