Shoppers sporting Tory Burch handbags and bangled bracelets flocked to the third annual Guilty Girls Warehouse Sale on Friday to embrace a shopping opportunity that rarely happens: designer merchandise at heavily discounted prices. These shoppers know how to spot a deal and when to shop — with the best merchandise being available in the first few hours of the 2-day show. Friday’s opening night party at University of Delaware’s Arsht Hall in Wilmington was so well-attended that some shoppers seemed almost disappointed that they couldn’t get a bit closer to the discounted merchandise. The non-profit Guilty Girls Giving Group chooses one charitable beneficiary each year. This year’s is Supporting Kidds, the center for grieving children and their families.