For in-store pickup only at Kmart, buy one pair of men's, women's, juniors', boys', girls', toddler boys' or toddler girls' sandals or flip flops, and get a second pair for free. With prices starting from 99 cents, that's as little as 50 cents per pair and a very strong sale on sandals from Kmart. Deal ends June 28. A couple of best bets: