Chatuchak is a charming place for shopping galore and great bargains. Touted as the world's largest open-air weekend flea market, this place is not for the faint-hearted. The easiest way to reach Chatuchak market is via the Skytrain. Drop by Mo Chit station and follow the streaming crowd to the entrance.
For Chartuchak virgins, you are highly recommended to brave yourself for mad bargaining, rubbing with sweaty bodies and exhilarating discovery. The best way to beat the heat is to arrive in early morning, when the heat is still bearable and the throbbing crowd has not yet arrived. Shoppers are encouraged to dress in shorts and sleeveless tops to get around the lack of changing rooms. Chatuchak is segmented into different areas, in theory at least: fashion and apparel, housing, vintage, pets, etc. In practice, it is probably hard to maneuver from spot to spot, and the best bet is to bargain for your best buy rather than with the hope that you can go back and find the same shop.
Most items are negotiable, and as a start, slash the price in half and bargain your way slowly up. Most owners are armed with doses of conversational English, but the calculator will prove to be your universal language. My advice is to bring a electronic portable fan and water bottle and enjoy the endless haggling. There are 199 baht items everywhere, but do not be overwhelmed by the good price your exchange rate fetches you initially. I was overwhelmed by the 25 baht earrings and 150 baht top I've acquired, but I soon learned that even 100 baht for a T-shirt can be bargained down further. Most items quoted are negotiable, even with big display signs. The trick is to buy in bulk and leave the shop without hesitation if you do not fetch the price you fancy. If the owner stops you with a discounted price, that's probably a good price you have fetched. If not, the quoted price is probably too low for profit margins. Go with a pack of fellow shoppers and buy in bulk and you will get a good price. Otherwise, threaten to leave. It's either we buy 10 or 0.
Shops close in the evening, so do make full use of your time there to haggle after cheap buys. Beware, though, Bangkok has a fascination with pirated goods. All things can be duplicated here, and there's no such thing as an original at weekend markets.