One thing I can easily see being able to &quot;reverse-showroom&quot; for cheaply is used books. Used copies of &quot;The Martian&quot; are currently $7.44 + $3.99 shipping at Amazon, which brings it to more than the $9.00 new price with Prime.<p>If my local bookshop gets in on the act and pegs used books to, say, even a dollar below the new book price on Amazon <i>and advertises that fact boldly</i>, I (and more importantly, a lot of millenials) would gladly buy from them instead.