Laura Jenemann and Brandon Butler

Imagine that you bought a new jacket on Amazon.com and received an email a month later from the manufacturer telling you that you paid the wrong amount for the jacket and that you owe the company several hundred dollars more. This may seem implausible, but for academic libraries that buy DVDs through distributors like Amazon.­com, it is a recurring problem: after buying DVDs at retail prices, they get an official-looking email saying they owe more.