6.9% off MSRP on a months old in-inventory vehicle just isn’t a good deal. Especially so on those Sterling editions which seem to have a more jacked up price over invoice.
Are you a MA resident buying out of state? Some states tax you on the full value, but it varies. Most of the time though, states’ tax laws are worded such that you pay the taxes in the state you’re registering the vehicle in anyway.