My house is "only" 67 years old. That is pretty new for our town. I believe the oldest home here is the Phineas Upham House which is right down the street. 1703 or 1730 depending on which historian is accurate:
Phineas Upham House - Wikipedia
There is a house in neighboring Saugus, MA that was built in 1692 called Boardman House that is pretty famous locally.
I found this interesting list on Wikipedia of the oldest houses in Massachusetts. The one in Salem, MA - Pickering House - was built in 1664 and is still being lived in.
List of the oldest buildings in Massachusetts - Wikipedia
I rented a really old house in Hingham MA for almost 5 years. No, insulation in the walls. Still had the original single pane windows. Uneven floors, low ceilings, small (about 710sqft). Extremely small bathroom which was basically renovated by making one room smaller. Clearly added after the invention of indoor plumbing.
I almost bought a 200 year old house in Maine when I was looking to buy. But just needed too much structural work. The people who eventually bought it, tore it down. Which was unfortunate.