Musician's Friend Clearance Center
They offer just about everything for the musician at this mega online music store. For example they carry guitars, bass, midi tools and midi keyboards, drums, percussion instruments, dj gear, lighting, recording equipment, hi-fi and audio / video equipment, books and videos, and band and orchestra gear and music. Of particular unique interest is their wide selection of sheet music, instructional software, videos, karaoke, and recorded music.

Save Up to 50% on the Hottest As Seen on TV Music & DVDs!
They are "the one-stop shop for fans of great music, past and present. Take a musical stroll back in time with our decade-based departments, featuring hit collections from the 60s, 70s, 80s, 90s and today. If Greatest Hits are your bag, we've got plenty of those, too, plus Sales & Specials galore. Every CD & cassette on our site is jam-packed with the quality songs & artists YOU want. Original songs as recorded by the original artists. In fact, almost all songs... were Top 20 hits, with of plenty of number #1's mixed in. And because our two-disc collections are sold exclusively on TV and on this website, you won't find them in any store!"

Yahoo! Music Unlimited
They offer you unlimited access to a library of more than two million songs. For an annual subscription of about $72 you can "Play and save music to PC or compatible device", "Get personalized music recommendations", have "Access to new releases", gain "Unlimited access from any PC without paying per track", and have access to "Over 150 LAUNCHcast Plus radio stations".