METALSMITH: Starting today, Jill Platner kicks off her once-a-year sale. Handmade silver jewelry is 15 to 60% off; purchases of $500 and up are accompanied by a complimentary seagull necklace. GET IT: April 30-May 2 at Jill Platner,113 Crosby Street; 212-324-1298; 12-7PM daily.