Serie A outfit Palermo are thought to be interested in his signature, but his agent Alessandro Beltrami believes the Hammers do not want to sell someone who they regard as a key player.
Beltrami told Sportitalia: "I have some contacts in the market because Valon is a player who is liked.
"We have agreed with West Ham to meet and discuss after the World Cup but the last time they spoke to me they told me that they consider Behrami non-transferable.
"Who wants him? Palermo did in January but West Ham had to stay up and they needed Valon."