Shopping on Maui
When You Arrive On MauiCostco (If you're a member.)
As you leave the airport, take a left at the first stop light and then turn into Costco. They offer the best deal on Hawaiian coffee. (1.5 lb bags of Kona Classic were just $9.) And you can stock up on macadamia nuts.
The Kaanapali Trolley runs from MKV's lobby to Whaler's Village every 20 minutes from 10am to 10pm.
Whaler's Village (upscale stores and restaurants)
It might be cooler at night:
Cannery Mall - Safeway, Longs Drugs and shops
Lahaina - Front Street
KapaluaShops at Kapalua (art, glass, etc.)
NapiliCraft market weekends
KiheiCrafts and shops
Wailea - Shops at Wailea (upscale)