Motion Trend via Amazon offers the Linkyo Brother TN450 and TN420 Compatible High-Yield Toner Cartridge 2-Pack, model no. LY-TN450, for $22.95. Coupon code "AZ15TNTN" cuts it to $18.36. Plus, Prime members receive free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $8.43.) That's $3 under our May mention's per-unit price and the best deal we've seen. (It's also a current price low for this quantity by $7.) It delivers an estimated print yield of 2,600 pages per cartridge. Coupon expires August 16.