You might consider buying music books like these Mel Bay Books and lyric sheets for a variety of reasons. One of which is when you might have a brother or a dear friend who goes to music school and would really appreciate stuff like these or you might also consider buying some of these items if you have a musician father, mother, relatives or friends who would really find it quite a thoughtful and useful gift item.
You might plan to buy this music supplies for other people, then again you might also need it for yourself if you happen to be a music student who require these music reading materials for your class or in one of your music lessons or if you are an enthusiasts who collect interesting music memorabilia to keep at home. Or you might plan to earn out of these items by buying them in bulk at lower prices and selling them to your friends and neighbors or classmates in music school, as well your other network online and off. It might prove to be a lucrative business depending on how well you have tapped your network to work to your advantage, too.
You might require music supplies for numerous reasons but keep in mind to shop only from the authorized shops and dealers to make sure you are getting the real deal and not a cheap reproduction.