Save room in your luggage for some green tea, since it's a great thing to bring home with you, not just as a gift but also as a reminder of your trip. There are all sorts of tea products you can buy straight from the source, but I especially like the hyunmi nokcha (green tea with toasted brown rice), the naeng nokcha (tea bags for making iced green tea in cold water), and galu nokcha (green tea powder you can use to make all kinds of green tea dishes, like green tea ice cream or green tea cheesecake). Other than Daehan Dawon, there are dozens of other green tea plantations in Boseong that sell their green tea products directly.
For other items, try the traditional O-il Jang ("5-day" Markets) in Boseong County. The Boknae-myeon Shijang, 152-14 Boknae-li, Boseong-gun, and the Joseong-myeon Shijang are open on days that end in 3 or 8. The Boseung-eup Shijang, 2-1 Wonbong-li, Boseung-eup, Boseong-gun, and the Deungryang-myeon Shijang, 446 Yedang-li, Deukryang-myeon, are held on days that end in 2 or 7. The Beolgyeo-eup Shijang, 663-2 Hwaejeong-li, Beolgyeo-eup, Boseong-gun, and the Hwacheonmyeon Shijang in Hwacheon-myeon are open on days that end in 4 or 9.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.