For its newsletter subscribers only, EverydaySource offers the Brother LC-61 Compatible Ink Cartridge 4-Pack for $15.99. Coupon code "S1005NSAU" cuts it to $3.49. With $3.37 for shipping, it's tied with our mention from four weeks ago and it's the lowest total price we could find, this time by $4 (outside of the mention below). This set includes one black, one cyan, one yellow, and one magenta cartridge. Coupon expires after 1,000 uses.

A close price: 2SToner via Buy.com charges $7.99 with free shipping.