Do you own what you buy?

It’s Still A Duck: Court Re-Affirms That First Sale Doctrine Can Apply to “Licensed” Software, article.
"Building on a prior ruling, a federal court has re-affirmed that a Seattle man was not infringing copyright law by re-selling software he obtained from an Autodesk customer.
The ruling is bound to frustrate the copyright industries, which have struggled for years to convince courts and their customers that the only thing you “buy” when you buy software is a limited and temporary right to use that software under certain conditions. In other words, they claim buyers aren't owners.
The distinction is no mere technicality. Under the Copyright Act, owners of copyrighted material are given substantial rights in the particular copies they purchase. One of the most important of these protections is the "first sale" doctrine, which says that once you've acquired a lawfully-made CD or book or DVD, you can lend, sell, or give it away without having to get permission from the copyright owner. Without the first sale doctrine, libraries would be illegal, as would used bookstores [...]"
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Aha! I've always wondered about libraries, how it worked legally and financially.