If it wasn't clear already, Amazon really wants you to sign up for Prime. As GeekWire reports, the company has adopted a unique pricing model inside its physical bookstores: one sticker price for Prime members, another for regular customers. Subscribers get the same amount shown on Amazon's website, while everyone else has to pay the normal (usually higher) list price. The unusual system has been in place since August, according to one store clerk, but this is the first we've heard of it. The message from Jeff Bezos is simple: sign up for Prime if you want the true Amazon experience.