The Spain international, who is under contract to the Basque outfit until 2016, has been heavily linked with a big-money move to Catalunya during the summer
It was claimed last week that the Catalans believe that the Spain midfielder is the ideal man to replace Seydou Keita, who is expected to move on at the end of the season.
However, the Estella-born star does not believe for a second that the European champions would be willing to hand over the €40m required to release him from his contract with the San Mames club, which runs until 2016.
"I do not think there's anyone who wants to pay so much for me," he told Mundo Deportivo. "I see it as too much money for me.
"I do not think I'm worth so much; I do not think that I'm worth €40m."
As to whether he would like Pep Guardiola's men to stump up the cash to bring him to Catalunya, Martinez is remaining tight-lipped.
"I'm not saying anything now," the 23-year-old defied. "These things [the rumours] are always going on in the world of football.
"Although it is very nice to be talked about in the newspapers; it is a product of what you are doing and says you're doing things right.
"I am very happy to talk about myself but now I'm very focused on what I have at the moment.
"That is enough, so I will try not to give much attention to that [the speculation]," he concluded.
Martinez, who has been capped seven times by his country, has made over 150 La Liga appearances for Bilbao since being plucked from Osasuna's B team in 2006.
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