Cost of tearing down a wall?

I recently bought my first co-op and am looking for any rough guidance anyone may have. We have a small 6x8 kitchen where we are looking to tear down ~6 feet of one of the walls. The wall has a gas line that we're hoping to move to the side, and one outlet, but is otherwise free. How expensive might this be? 10k? 25k? more? If it helps, the building is older (1960's) and the walls seem pretty thick (probably concrete our inspector said) I know a lot of the cost of renovation will be the new cabinetry / countertop / etc, but it'd be nice to get some idea of cost on just the wall tear down.