While we've always thought of the pied-a-terre as a city thing, it turns out that there are a handful of Cape and Island listings touting themselves as such. It's understandable - the term conjures up images of a perfectly sized, perfectly located, and perfectly expensive residence that's not meant to be lived in full-time. Hello, Nantucket! Case in point, this 1BD, 1BA unit in the circa 1785 Captain Gardner House. After a 2013 nip/tuck, the 786 square foot apartment debuted on the market in August looking for $895,000. An October chop brought the ask for the fully furnished "contemporary transformation" down to $845,000 and by early November, the spread was in contract. Late last week, the buyer(s), hidden behind an LLC by the name of Diversified Capitol Commitments (Lobbyist for matchmakers? State House dome painter?), paid $815,000, or $1,036 per square foot, for "sophistication, elegance and luxury" on Center Street.