What are the options for buying second-hand phones in Thailand besides Marketplace and Buy and Sell Pattaya?

In Thailand, there are numerous alternatives for purchasing second-hand phones aside from the Marketplace and Buy and Sell Pattaya. Popular options include shopping malls where many small phone shops are located, particularly MBK in Bangkok, which is noted for its extensive selection. Additionally, platforms like Facebook Marketplace and Lazada provide opportunities to find second-hand devices, although caution is advised due to the presence of scammers on Facebook. Other notable locations include Big C, Lotus, and Tukcom, which also sell used phones.