370 W 120th St at Manhattan Ave. Subway: A to 125th St. It's the first summer the PTA of P.S. 180 is organizing this outdoor market, featuring more than 20 local vendors selling everything from handmade gifts to gently used threads. Look for Sama women's sunglasses for $30, vintage mother-of-pearl bangles tagged $5 each, a 1980s snakeskin purse marked $25 and a Betsey Johnson lace party dress for just $40.