There has been much conjecture about the player's future, with Feyenoord looking to renew their interest having previously been rebuffed.
Immers scored against Feyenoord at the weekend and went on to hint he was hoping to move on soon, but ADO commissioner Paul Beyer Bergen said the club are only willing to deal at the right price.
"We have kept clearly to the agreements (with Immers) but apparently it is now interpreted differently," he told Voetbal International.
"If a club to announce an acceptable proposal, we'll just go around the table with them. That also applies to the alleged new interest from Feyenoord."