Forbes has a ranking of the most expensive zip codes in the United States. (Do they even have zip codes in other countries? Or only the much-less-zippy “postcode”?) The criterion is the median home sale price. Beacon Hill’s 02114 comes in at number 18 with a median home sale price of $1,135,000. That’s the only Boston-area code I see on the list. Indeed, after consulting Nick Aster’s zip code map, it looks like it’s the only New England (ie “0”) code on the list. West coast (ie “9”) codes seem to be well represented.