Martin Standard Series OM-42 Koa
guitar · 2005–2008
Not enough sold data for a typical price — 3 sales on record all-time.
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Not enough sold data for a typical price. 2 for sale, from €5,276. Closest new: Martin OM-42, €7,399 at Thomann.
For sale right now
The best-priced as cards, a row of them; every other ad as a line, by ask. Each ask is the seller’s own number; the platform’s mark opens the listing. Each one says when we last confirmed it at its source: the price and availability are from that visit, so check the marketplace before you go.
Reverb
Recent sales by listing date
| Listed | Price | Condition | From | Platform | The listing |
|---|---|---|---|---|---|
| 2 Jan 2023 | €4,466$5,200 as sold | excellent |  United States | Reverb | Details |
| 26 Jan 2020 | €3,521$4,100 as sold | excellent | United States | Reverb | Details |
| 12 Jan 2017 | €3,649$4,249 as sold | excellent | United States | Reverb | Details |
A date is the day the ad went up. Marketplaces do not publish the day a sale closed; each of these had sold by the time we recorded it, in August 2026. A price is what the listing last asked, converted at that day’s rate.
Cheapest live: 
United Kingdom €5,276 · 
Netherlands €6,678 · before shipping
3 recorded sales of the Martin Standard Series OM-42 Koa, too few to quote a typical used price. Cheapest live €5,276 before shipping. Figures computed 20 October 2026.