World Music Supply, the "Musical Warehouse to the World", is an online store for guitars, drums, studio gear, and other musical instruments and equipment.
Musicroom is an online store for printed sheet music and musical instruments, and support musicians both beginner and expert.
Gear4music sells guitars, drums, keyboards, and more music gear. Their mission is to make purchasing and owning instruments and equipment easy through good prices and good service.
Woodwind & Brasswind is an online store of musical instruments with a focus on woodwind and brasswind instruments. They sell largely to schools in addition to professionals.
eMedia Music provided lessons for voice, guitar, bass, piano, and violin, from beginners to intermediate.
The Music Stand is music gifts retailer that sells music-related clothing, decor, and accessories.
Fiddlershop sells high-quality violins, violas, and cellos, as well as accessories for those instruments.
Guitar Center is the largest retail music gear company in the world, known for selling guitars as well as many other musical instruments and accessories.
Musician's Friend is an online store that sells musical instruments and accessories. They are known for price matching, free shipping, and a good return policy.
Sam Ash Music is America's largest family-owned musical instrument retailer. They sell a huge variety of instruments and accessories, boasting over 50,000 products.
eBay is an online marketplace where companies and individuals can sell new and used items, or bid against each other on buying those items.