Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Diamondback
Previous used estimate
$67 - $69
Actual value depends on condition, size, and local demand.

12-month projected trend
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Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
Diamondback's Octane 20 is a great bike to fuel adventures around the neighborhood and everywhere else. Its lightweight aluminum frame and wheels get up to speed with ease and the suspension fork provides a smooth, comfy ride. And, with its grippy ATB tires, hill-topping 6-speed drivetrain and powerful linear-pull brakes, it's the perfect bicycle for hitting the road and trail.
Inspection
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Inspection
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.