Store managers can be butts. HOW-EVERRRRR, at mass market places this type of behavior may actually signal a good deal (as the price is low enough that he doesn't want to to put any effort into the sale). Or not... just a feeling I get sometimes.
I googled the speakers and although they look nice, there is no US info that I could find. The speaks (sans SW) showed one price of over 500 Euros which, by pure translation, means you have a screamingly good price, but sometimes stuff gets more expensive over the pond so this is not necessarily a good yardstick.
But speaks + SW for $350... will he let you return them? I can't see how you could go too far wrong. They are probably decent.