Martin 00-18 Value Guide

Standard 00-18 rows begin at 1920. Earlier standard guitars belong to the small and early Martin price guide. The 00-18K starts earlier here because that existing guide doesn’t have a specific koa-model row. Missing years require individual appraisal, not an average of the neighboring bands.

Use the classical values for 00-18G and 00-18C, and the electric values for 00-18E. Tenors and plectrums have their own guides. Modern signature, Custom Shop and historical recreation models aren’t included in this chart.

Once the configuration matches, check the condition assumption. A range for an excellent original example isn’t a promise that a guitar with a replaced top, extensive overspray or structural problems will reach the lower endpoint. An individual instrument can fall outside the range, and the appraisal should explain why.

The converted 00-18H row describes a specific market category. Ask how the conversion was performed and whether its documentation identifies the work to the nut, frets, bridge, saddle and neck angle. A seller’s phrase “professionally converted” supplies no details by itself. The repair invoice and current measurements are more useful.

Consider what remains original and what was changed to make the guitar playable in the usual position. A conversion that preserves the body and bridge arrangement raises different questions from one with extensive alterations to the top or fingerboard. The price assessment needs that distinction before it can compare the instrument with the chart’s group.

An unconverted Hawaiian example needs an individual appraisal. The converted range shouldn’t be copied onto it, and the cost of a proposed conversion shouldn’t simply be subtracted from that range to create a purchase price. The finished result, buyer interest and amount of original material preserved are all still unknown.

Koa models also require their own rows. Don’t borrow a standard spruce-top 00-18 figure because the outline is similar. Confirm the complete wood set and model identity first, then document finish, repairs and setup just as carefully as on a standard instrument.

There isn’t a dependable percentage formula for combining these conditions. A bridge replacement might be part of the same repair as a top patch, and a neck reset may have accompanied a refret. Treat the work as a documented history, then compare the completed instrument with other guitars of the same model and configuration. The broader condition guide explains why different repairs affect collector interest differently.

Joe’s 1952 00-18 supplies a readable model and serial photograph together with the bridge, headstock, tuners, back and sides. That makes it useful for showing an appraisal photo set. It doesn’t turn a photograph into an untouched-original guarantee, and no sale price for that individual guitar is used here.

The 1951 guitar has a professional neck reset and a documented fingerboard-extension shim. The 1962 example has a small professionally repaired hairline crack. Their preserved appearance makes them useful comparisons, while those disclosures still belong in an appraisal. The paired identification guide includes the corresponding photographs and source records.

For an inherited 00-18, keep the case, old receipts and family pictures together. A documented ownership chain can clarify how the instrument was used and who authorized repairs. A one-owner history doesn’t prove that no work occurred; an owner may have maintained the guitar for decades without retaining every invoice.

Photograph the guitar in its present condition before cleaning or repair. Heavy polishing can make finish assessment harder, and replaced parts can remove clues that would have answered a model question. The guide to restoration before selling helps decide which work should wait for an appraisal.

If a repair is already under discussion, send the written estimate and photographs of the problem. The cost of the job and the guitar’s value after the work are separate questions. Some repairs improve playability while leaving an originality issue unchanged. Others stabilize damage that would otherwise worsen.

Include the case condition in the description. Show the latches, handle, lining and any maker’s label, and say whether you know it came with the guitar. An original case is an assumption in these ranges; a later case shouldn’t be quietly described as original because it fits well.