Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Diamondback
Previous used estimate
$59 - $61
Actual value depends on condition, size, and local demand.

12-month projected trend
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Direction and magnitude, not judgment
vs. category average
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Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
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Diamondback's Viper is perfect for aspiring racers and dirt jumpers alike. It lets you experience the speed of a race bike and the strength of a jumping rig in one affordable package. With a rock-solid Diamondback steel frame and durable components, the Viper gives you the stability and durability to rule the trails and track.
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.