RICHARD: There are a lot of nice historical places up there [in Boston].
CHRISTOPHER: Something historical in our price range would be perfect.
Richard might be thinking of the historic Back Bay and Beacon Hill neighbourhoods in Boston, famous for their rows of Victorian brownstone terrace houses. Such brownstones can cost millions today, and no wonder Christopher is quick to qualify it as “in our price range”.
When we eventually see Christopher and Sherry’s apartment in Boston, it does look like it’s supposed to be a historic brownstone-ish sort of building, but in a retail/dining area, so presumably cheaper. (It’s just filmed on the Warner Bros lot, it’s not a real apartment).