The swap meet is held on Wednesdays and weekends (except for event days) outside Aloha Stadium. The cost is a dollar per person, and there's plenty of parking. You can also get there from Waikiki via TheBus route #20, Route A City Express (from Ala Moana and just outside Waikiki) and some daytours go there as well. The attraction for visitors is the chance to buy souvenirs at generally lower costs than Waikiki stores. Dozens of regular vendors ring the stadium and sell everything from aloha wear to macadamia nuts to beach towels to postcards and magnets. The aloha wear selection is extensive (including lots of plus sizes!), but don't expect "name" labels.  Locals go for the flea market items like the luggage, knives or other niche items. It's also well worth seeking out the one-off yard-sale vendors in the inner-ring lots closer to the stadium. These people pull up the car, spread out a blanket and sell what they had in the attic, and sometimes it's unusual or hard-to-find. Saturday and Sunday mornings are your best chance to see them. Do be forewarned: Winds and mauka rains often will hit, especially in the afternoon. If this happens some vendors will call it a day, so your best time to get there is 9-10 a.m.