"Everyone has a price but the decision must be from the board and the player," said Laszlo.
"If Lee Wallace moves, I am not very happy about this, as he is a very important piece of this squad."
News that Celtic left-back Danny Fox is wanted by Burnley has given rise to the Glasgow club's reported interest in Wallace, who has previously been linked with Ipswich.
Last January Hearts sold captain Christophe Berra to Wolves.
"He had the price and they paid this and he moved," said Laszlo, referring to last year's sale.
Hearts' defensive options will be bolstered in the summer by the arrival of Darren Barr, who has agreed a pre-contract with the Tynecastle club.
"Lee is a good and professional player but we talk about Barr before and why he would like to come here because he's sees the chance to improve - with Lee Wallace it is the same," added Laszlo.
Source: BBC Sport
Source: BBC Sport