Why would First Sale Doctrine not provide a defence? What has the origin of the product to do with the right to re-sell? If you buy some items on a foreign trip would you be prohibited to put them up at a yard sale? The foundation of capitalism is that goods can move freely. If you allow, in this case publishers, to stop alternative sales (not talking piracy here) then you put the market forces out of play. An importer of goods, be it Canadian beer, German cars or Thai books, are re-selling something bought in a foreign country.
Does the name Pavlov ring a bell?