Boston.com talked to real estate company Redfin about a new survey that bears out what many would-be JP homeowners will tell you: Our neighborhood is brutal for buyers. Redfin puts 02130 as the fourth-most competitive Zip Code in the nation. That's behind three Zips in San Francisco. Nearly three out of four homes sold here last year brought in multiple offers. And 60 percent of sales went for more than asking.