I buy them because like it was stated before, I really don't have the time to learn how to make my own clothing and when I have tried just get something I want takes way too long and looks awfully crappy. What I do instead is buy the clothing sets I like (my son buys sets as well...we share the same PC) and I try to use them in different ways. Some products are just perfect the way they are (check out my last two renders) but with others I mix and match and do different things with the textures (My Red Brigrade series was a good example of that)