Groupon offers the Carlo Lusso Men's Classic-Fit 3-Piece Suit in four colors for $89.99. Coupon code "SALE3" cuts that to $80.99. With free shipping, that's $519 off list and the lowest total price we could find. It's available in small, regular, and large jacket sizes 36 to 50 and waist sizes 30 to 44, although not in all color/size combinations. Deal ends May 19.

Of note, this coupon is good for up to three uses per customer.