So long as you don't spill coffee on it, you can always resell it. I got a set when a coworker jumped ship with no forwarding address and left all his books. I

So long as you don't spill coffee on it, you can always resell it. I got a set when a coworker jumped ship with no forwarding address and left all his books. It seems useful for people implementing languages and standard libraries, less useful for people using them.