Shwekey does not have the RIGHT to say you are renting a CD if he prices it the same as a purchase. Does he reimburse part of your money if you choose to return it after you listen to it? NO? Then it is not a rental if it is the same price as a purchase.
This was discussed many times by many poskim. If you buy it, it belongs to you and you have the right to make another copy for yourself and use it for yourself. You don’t have a right to make a copy for your spouse and children. You can lend them your copy while you don’t use it, or they can listen to it on your computer, ipod, cd player. If you buy a copy of microsoft office, they allow you to put it on your desktop and on your laptop which are both registered to you. However, they don’t allow you to put in on YOUR computer and on someone else’s computer, that is breaking their copyright rules. Your wife can use your computer and your copy of office while using your computer and they can’t stop her nor do they have a right to stop her as long as she is using your computer.
Observanteen everything is not “phsat” some things need mephorshim.