Buyers Guide
| Company | Location | Company Type |
|---|---|---|
| M. P. Rathke, Inc. | Spiceland, Indiana, United States | Manufacturer |
| Madeira Pipe Organ Service | GARWOOD, New Jersey, United States | Manufacturer |
| Malmark, Inc - Bellcraftsmen | Plumsteadville, Pennsylvania, United States | Manufacturer |
| Mander Organs | London | Manufacturer |
| Marceau & Associates Pipe Organ Builders, Inc. | Portland, Oregon, United States | Manufacturer |
| Marshall & Ogletree | New York, New York, United States | Manufacturer |
| Martin Ott Pipe Organ Company Inc. | St. Louis, Missouri, United States | Manufacturer |
| Mascioni Organs | AZZIO, Italy | Manufacturer |
| Matterhorn Travel | Annapolis, Maryland, United States | Manufacturer |
| Maurici Piano and Harpsichord | Brooklyn, New York, United States | Manufacturer |
| Meeks, Watson & Company | Georgetown, Ohio, United States | Manufacturer |
| Mel Bay Publications Inc. | Pacific, Missouri, United States | Manufacturer |
| Meloni & Farrier | Manufacturer | |
| MENC: The National Association for Music Education | Reston, Virginia, United States | Manufacturer |
| Messrs. Czelusniak et Dugal, Inc. | Northampton, Massachusetts, United States | Manufacturer |
| Michaels Music Service | Charlotte, North Carolina, United States | Manufacturer |
| Miller Pipe Organ Co. | Louisville, Kentucky, United States | Manufacturer |
| Milnar Organ Company | Eagleville, Tennessee, United States | Manufacturer |
| Monarke Church Organs | Ede | Manufacturer |
| Morel & Associates, Inc. | Denver, Colorado, United States | Manufacturer |
| MorningStar Music Publishers | Fenton, Missouri, United States | Manufacturer |
| Muller Pipe Organ Company | Croton, Ohio, United States | Manufacturer |
| Musica Dulce | Sacramento, California, United States | Manufacturer |
| Musicom | Bideford, United Kingdom | Manufacturer |
