While co-op maintenance fees and assessments are not negotiable from the perspective of a unit owner, it may be possible as a buyer to negotiate with a seller and ask them to cover some or all of any ongoing or upcoming assessment.
If you’re thinking of buying a co-op but you’re concerned about high maintenance, just remember one thing: monthly maintenance only goes in one direction:UP. All else equal, you should expect to be paying less money for an apartment with higher maintenance.