Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Diamondback
Previous used estimate
$170 - $175
Actual value depends on condition, size, and local demand.

12-month projected trend
— %
Direction and magnitude, not judgment
vs. category average
4%
Drops faster than category avg
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
Choose a different build or frame style to see its value.
Diamondback’s Insight STI-8 is ready to make your rides to work and back more fun than ever, and let you head out to explore the countryside on your weekends in style, too. You'll love its efficient, nimble-handling Diamondback aluminum frame and the easy-rolling 700c wheels with quality Kenda tires. Plus, you get a durable, smooth-shifting Shimano Nexus 8-speed drivetrain for the ups and downs, excellent linear-pull brakes for speed control and a plush Diamondback seat for ride-all-day comfort.
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.