Meritline offers the G&G PGI-250XL / CLI-251XL Canon-Compatible Inkjet Cartridge 5-Pack with Chip for $16.95. Coupon code "MLCD10VN" cuts it to $9.95. With free shipping, that's $5 under our April mention and the lowest total price we've seen. (It's a current price low by $1.) These cartridges fit several types of Canon inkjet printers; use the compatibility chart on the product page to check specific models.