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12-month market range
$17,754
median auction price
4
recent auctions
7
auction sources
daily
market refresh
4 Auction Sales
Completed sales, not listing estimates
Updated Daily
Yesterday's auction activity available today
Seven Sources
BaT, Cars & Bids, Hagerty, PCAR, Gooding, and more
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Direct answer
A Harley-Davidson 45 Flathead typically sells for about $17,754 at auction, with recent examples commonly ranging from $16,938 to $17,819 based on 4 sales from the last 12 months.
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The Harley-Davidson 45 Flathead, first produced in 1937, is a landmark 45 ci side-valve V-twin whose simple, rugged engineering appeals to classic car and motorcycle enthusiasts. Known for its flathead design, strong low-end torque and period styling—famously adapted in the wartime WLA—the 45 Flathead embodies vintage character and mechanical accessibility. Its timeless lines, historic service with police and military units, and ease of restoration make the 1937-era 45 Flathead a prized vintage collectible for classic car and motorcycle collectors.
