Canon offers 10 Photo Paper Plus Glossy II 4x6" 100-Sheet Packs (1,000 sheets total) for $18.99 with free shipping. (Add one to cart; the others will be added automatically.) That's the lowest total price we could find for this quantity by $51.

Of note, Canon also offers 10 Photo Paper Plus Glossy II 8.5x11" 20-Sheet Packs (200 sheets total) for $13.99 with free shipping. (Add one to cart; the others will be added automatically.) That's the lowest total price we could find for this quantity by $36.