14B North Commons — Kristin Swanson to Brianne Krupsaw for $435,000 (April 30) 314 Hemlock Circle — Thomas M. Healy Jr. Trust to Mary Ryan for $502,000 (April 26) 3 Millstone Lane — Margo Selzter to Robert D. Valleau Trust and Pamela M. Valleau Trust for $1,800,000 (April 26) 54 Conant Rd. — Reihl Mahoney…