There are 65 male and 45 female merchants in Skyrim, so Dragonborns interested in Allure have an advantage if they choose to be female. Alternatively, Speech can be used to persuade people into doing things or divulging crucial information. At 100 Speech, merchants will sell items for twice their base price and buy them for half as much. At 0 Speech, merchants sell items for 3 times their base price, and buy for a third of their base price. Speech directly affects the prices paid when buying from and selling to merchants, even without the assorted perks.