231 W 29th St between Seventh and Eighth Aves, suite 201. Subway: 1 to 28th St. Complete your party ensemble with up to 70 percent off trendy bags. Pearlized styles with removable chain straps are $95 (were $225), snake-print clutches are pared from $225 to $100, and gunmetal looks are tagged $125 (normally $295). Also keep an eye out for the $20 bargain bins.