At Canon, buy a Canon Glossy 4x6" Photo Paper 50-Sheet Pack for $9.99 and another nine packs will be automatically added to your cart for free. (That's 500 sheets in all.) With free shipping, that's $90 off list, 2 cents per sheet, and the lowest total price we could find. (We saw an extra 50 sheets included for the same price last month, however.)