Martin Value Guide · October 2026
Martin OM-18 Value Guide: Prewar Originals
Original prewar Martin OM-18 values range from approximately $22,000 to $44,000 for excellent original examples. The year, tuner configuration and pickguard style determine the appropriate range.
Comparison Photo: 2005 Martin OM-18GE
Original 1930s OM-18 guitars. Modern models named for 1933 and other reissues are outside these ranges. Compare The Authentication Guide.
Current Value Ranges
Estimated retail values in U.S. dollars, as of October 2026. Condition and originality affect the final value.
| Model And Period | Estimated Retail Value (USD) |
|---|---|
| 1930 To 1931, Banjo Tuners And Small Guard | $36,000 to $44,000 |
| 1931, Standard Tuners And Small Guard | $30,000 to $40,000 |
| 1932 To 1933, Standard Tuners And Large Guard | $22,000 to $28,000 |
| Major Finish Or Structural Repairs | Individual Appraisal |
| Original Shade Top | Individual Appraisal |
Ranges generally assume excellent original condition unless a row states otherwise. Dealer purchase offers and consignment proceeds differ from retail value.
Condition And Originality
The original bridge, bridge plate, top, finish and period hardware affect value. Large side patches, replacement wood and extensive finish work require individual assessment. An original shade top also needs separate appraisal. Modern OM-18 reproductions fall outside these prewar ranges.
For the broader comparison, read how repairs and changed parts affect guitar value. If the finish has been changed, the refinish value guide explains full and partial work and why an acoustic needs its own assessment.
Your Martin's Model, Year And Condition
Get A Value For Your Martin
Send photos of the instrument and any repair records for an assessment of your guitar. You can read about Joe Dampt and the instruments he buys before getting in touch.
Photo Credits
Photographs from Joe's Vintage Guitars. Comparison photographs are labeled and do not depict the exact model being valued.