Most poeple think fabrics are cheap, but in reality they are not. The super high grade ones are not easy to produce at all, and what limited supply are always snatched up. Have any of you seen the process whereby they convert cotton into actual usuable fabric? For the luxurious ones you'll be stunned at how much effort goes into producing one bale.
When fashion houses buy fabrics, they are buying from suppliers and pay a fixed price for it. Hence when they price their clothes this is taken into consideration. They dont pay $5 for a bale and then price it at $500. They dont rip you off that much
I would LOVE to see you sell that much. The houses are not stupid, they would not pay that much for a length of cloth thats hardly worth anything. If pricing is way over the top and unreasonable, nobody would even consider buying. Would you spend $800 on a shirt that feels like its made from a rucksack even if its Dior? Dont forget the costs it would incur during the process of making a shirt from fabrics. I estimate Dior shirts actually cost around $200-$400, which means they profit about 50% from each item