If you are looking for a specialty harmonica shop then Harmonicaland is the ultimate harmonica store
They have almost everything in stock and ship worldwide
You will find all the major brands and models : Seydel, Suzuki, Hohner, Harmo and Lee Oskar
This harmonica store sell all the famous 10 and 12-hole diatonic “tin sandwich” : Marine Band, Marine Band Deluxe, Marine band Crossover, Manji, Golden Melody, Special 20, Blues Session Steel, 1847, Blues Harp in all 12 keys.
chromatic harmonicas : Chromonica 270, Chromonica deluxe, Chromonica 280, Chrometta 12, CX12 jazz, Amadeus, Meisterklasse, Sirius, SCX-48, SCX-64, Saxony, chromatic de luxe steel, Super 64X
Signature mouth organs : Larry Adler, Bob Dylan, Toots Thielemans, Gregoire Maret, Steven Tyler
Folk, tremolo, octave harmonicas like my grandpa used to play
and even the big bass and orchestral harmonicas !