Current market reference from completed auction sales over the last 12 months.
13 auction sales
Completed sales, not listing estimates
Updated every 15 minutes
Yesterday's auction activity available today
Nineteen sources
BaT, Cars & Bids, Mecum, Bonhams, SOMO, and more
Direct answer
The Harley-Davidson 45 Flathead market carries a current 12-month median auction price of $17,750 across 13 tracked sales. Recent examples commonly range from $15,400 to $20,500.
Values are estimated from completed auction results. Old Cars Data does not add buyer premiums, taxes, or fees during normalization, but source-reported results may already include them. Private-party sales, dealer asking prices, and undocumented condition details are not included unless they appear in source data.
12-month snapshot
Based on sold auction results from the past 12 months.
Past 12 months
Mid market
25th percentile
75th percentile
Sold examples
Photos from real Harley-Davidson 45 Flathead examples that crossed the block, each tied to its completed sale.
Imagery sourced from completed auction listings
Overview
Over the last 12 months, 12 Harley-Davidson 45 Flathead examples sold in USD at tracked auctions across 7 model years. The most-traded model year was 1942, with 4 sales at a median of $26,950. Condition, mileage, originality, and documentation explain most of the spread between individual results.
Model years
Median completed USD sale for each model year over the last 12 months. Each year links to its own valuation page.
Latest results
The most recent completed Harley-Davidson 45 Flathead auctions across all tracked sources.
| Price | Year | Mileage | Auction house | Location | Date | Status | Listing |
|---|---|---|---|---|---|---|---|
| $17,000 | 1940 | 38,000 mi | Bring a Trailer | Sister Bay, WI | Oct 2, 2026 | Sold | View auction |
| $16,500 | 1942 | 27 mi | Bring a Trailer | Leander, TX | Jun 26, 2026 | Sold | View auction |
| $14,000 | 1941 | 45 mi | Bring a Trailer | Leander, TX | Jun 26, 2026 | Sold | View auction |
| $20,500 | 1941 | 500 mi | Hagerty | Van Nuys, CA | Jun 5, 2026 | Sold | View auction |
| $10,925 | 1950 | 0 mi | Bonhams | 475 Steamboat Road | May 31, 2026 | Sold | View auction |
| $15,400 | 1945 | 0 mi | Mecum Auctions | Unknown | May 14, 2026 | Sold | View auction |
| $38,500 | 1942 | 0 mi | Mecum Auctions | Unknown | May 13, 2026 | Sold | View auction |
| $24,200 | 1942 | 0 mi | Mecum Auctions | Unknown | May 12, 2026 | Sold | View auction |
| $29,700 | 1942 | 0 mi | Mecum Auctions | Unknown | May 10, 2026 | Sold | View auction |
| $17,759 | 1934 | 30,000 mi | Bring a Trailer | Bloomington, IL | Feb 20, 2026 | Sold | View auction |
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Reference notes
A Harley-Davidson 45 Flathead typically sells for about $17,750 at auction, with recent examples commonly ranging from $15,400 to $20,500 based on 13 sales from the last 12 months.
Among model years with at least 3 completed USD sales in the last 12 months, the 1942 has the highest median at $26,950 across 4 sales.
We tracked 13 Harley-Davidson 45 Flathead auction sales in the last 12 months.
Model year, mileage, condition, originality, service history, color, options, and provenance all move prices. Sparse markets can swing materially on a single notable sale.
Bring a Trailer, Cars & Bids, Hemmings, AutoHunter, Hagerty, PCAR Market, All Collector Cars, Gooding & Co, RM Sotheby's, Barrett-Jackson, Sotheby's Motorsport, Car & Classic, The Market, Broad Arrow, MB Market, Mecum Auctions, PistonHeads, Collecting Cars, and Bonhams, refreshed every 15 minutes and mapped into one consistent schema.