Thailand is a shopper's paradise and many visitors to Bangkok in particular end up spending much of their time in the countless markets and malls. Particularly good buys are clothing, both cheap locally produced street wear and fancy Thai silk, and all sorts of handicrafts. Electronics and computer gear are also widely available, but prices are slightly higher than in Singapore, Hong Kong, Philippines, and Kuala Lumpur. A good strategy for shopping, is to first go around doing window shopping for a couple of days, don't commit yourself to purchase anything until you have seen enough to be able to make sensible judgements. The last thing you want is to impulsively buy something today and two days later see the same or similar item selling at a much reduced price elsewhere. Most shopping centers in Bangkok have sales often, but even better is to go a bit out the big city into a place like Future Park for example. At the Mo Chit minibus rank next to the public park ask for "Future Park" minibus. Go early, the trip costs 35Baht, takes about half an hour and you get a chance to mix with the real Thais going about their daily lives. Once at Future Park shopping complex, its vast multilevel shopping areas go on and on (opens at 10:00, closes at 21:00) and it caters for everyone and everything, cheap and upmarket, from motor vehicles and home appliances, to clothing and furniture, Thai therapy and restaurants. You can spend the day hunting for special deals and shopping with many sales on offer with prices catering for local customers, department stores like Robinson are extensive and a bargain hunters paradise. If you get hungry or thirsty, there's plenty of varied restaurants on offer and also a large supermarket within, with a help yourself fresh salads and other foods bar selling food by weight. The main Zpell entrance facing the elevated freeway is by the minibus rank and once inside there's an information island desk with English speaking staff at hand, while you can always download a translator app to help you just in case. On returning to central Bangkok, go back to the main minibus rank and ask for the "Mo Chit" vehicle, alternatively, return by taxi cab to central Bangkok (100-120 baht), the better option, if you find yourself carrying lots of shopping.
A Thai speciality is the night markets found in almost every town, the largest and best-known of which are in Bangkok and the Night Bazaar in Chiang Mai. Here a variety of vendors from designers to handicraft sellers have stalls selling goods which cannot normally be found in malls and day markets. Most night markets also have large open air food courts attached.
You can also find marvellously tacky modern clothing accessories. Witness pink sandals with clear plastic platform heels filled with fake flowers. Night markets along the main roads and Bangkok's Mahboonkrong (MBK) Mall, near the Siam Skytrain stop, are particularly good sources. Not to be left out is what is often touted as the world's biggest weekend bazaar - The Chatuchak Weekend Market or known to locals simply as "JJ" Market. Chatuchak sells a myriad of products ranging from clothes to antiques, covers over 35 acres (1.1 km²) and is growing by the day!
Haggling is the norm and often market and road-side vendors will try to charge you as much as they think you can afford to pay. It's not uncommon to buy something, walk outside, and find somebody who bought the same item for half or one third what you paid (or even less). Try to figure out the item's rough value first. Adjacent stalls, government-run fixed price shops and even hotel gift shops are a good starting point. You'll find that prices drop drastically when the seller realizes you have some idea of what it costs.