DuraECO via Amazon offers Amazon Prime members the Brother TN360-Compatible Toner Cartridge for $12.26 with free shipping. (Non-members can spend $25 or more for free shipping; otherwise it adds $6.35.) That's a buck under last week's mention and the lowest total price we've seen for this toner. (It's also a current price low by $5, outside of the price below.) This cartridge is compatible with the Brother HL-2140, HL-2170W, and other Brother laser printers.

A close price: Overstock.com offers it for an in-cart price of $12.59 with free shipping.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months. (Note that currently there's a waitlist for Amazon Mom.)