Well honestly, you can't if you're a nonmember. But, you can try and find a kindhearted member to buy you something of a certain color. When I was a non member and I wanted say, a black necklace, I would go to jamaa township and say, "could any member please buy me a black necklace?" Really you can just put whatever item you want and there SHOULD be at least one kindhearted member there that will help in your non member dilemma. Also, I'm sure there is a glitch way, and that might be the answer you were looking for, but personally, i like to do things the REGULAR way, without the help of glitches.