Linen is already extraordinarily limited (I believe its two lengths of white and one length each of other colors) per reboot in Allanak. I don't even use that store that much and it still pisses me off. If you didn't change the price of silk there, to be honest, you deserve as many rolls as you're willing to buy. Besides, 1) Wearing enough silk is going to put you in the Arena, 2) You will never make a profit as an indie on silk, and 3) A length costs as much as a mount does.