This Popular Deal on toner is back, this time without a promo code. Just check the "Save an extra 30%.." box to see discount at checkout.
Dell Toner Cartridge Refills (magenta, cyan, yellow, black) by Miroo, sold by Smartjet, fulfilled by Amazon, for $11.19 after coupon. Description claims it'll yield 2k pages in black/white, and 1.4k pages in color.
Compatible Dell printers: 1250c/1350cnw/1355cn/1355cnw/C1760nw