PenguinInk.com offers several ink and toner cartridges at lowest-we-could-find prices, as listed below. Orders over $49 receive free shipping; otherwise, shipping adds $4.95. The deals:

• refurb HP 57 Tri-Color Ink Cartridge (pictured) for $12.95
• refurb HP 21 Black Inkjet Cartridge + HP 22 Tri-Color Inkjet Cartridge for $18.95
• refurb HP 57 Tri-Color Ink Cartridge 2-Pack + HP 56 Black Ink Cartridge for $29.95
• HP Compatible 564XL 6-Pack for $54
• HP Compatible C7115x Black Laser Toner Cartridge 2-Pack for $55.95