Ebbo via Amazon offers its Ebbo Brother-Compatible TN336/TN331 Replacement Toner Cartridge 4-Piece Set for $40.77. Coupon code "CD2DTUX7" cuts that to $26.50. With free shipping, that's $13 under the lowest price we could find for a similar set. This set is compatible with select Brother laser printers. (Models are listed on the product page.) It includes black, cyan, magenta, and yellow cartridges, with a yield of 4,000 pages in black and 3,500 pages per color. Deal ends March 31.