When gentrification knocks on the wrong door

New York

MONXO Lopez is a popular man. He wishes he was not.

Total strangers hound him, calling, writing and knocking on his door, all with the same question: Does he want to sell his red brick row house nestled on a historic South Bronx block in Mott Haven? When he complained to a friend who worked in real estate, the friend replied: "You know, you can get a million and a half."

Given t…