Amazon cuts up to 60% off a selection of Diamondback bikes & accessories. (Prices are as marked.) Plus, Prime member receive free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping starts around $6.) Deal ends March 1. A couple of best bets:
REI Outlet offers the Diamondback Century 3 Bike in Silver for $826.73. Choose in-store pickup to avoid the $75 oversized shipping fee. That's the lowest total price we could find by $522. It's available in 56cm or 58cm sizes and features a carbon frame, tapered alloy steerer, and 20 gear combinations.