well,may i suggest u some easy sentences to use...(for girl >_<) sa-wat-dee-kha = hello tao - rai - kha = how much? lod - hai - noi - dai - mai- kha? = can u please discount for me? kop - khun - kha = thank u ^^ (if u r boy just change the last word from "kha" to "krap") hope these would be useful for u ^^

Two tips, but not phrases (sorry) - the first one you may already know, which is just to start walking away. ;) The other tip is that stall holders buy their stock in the shopping centres. My Thai friend pointed it out to me last time I was there. This means you're probably paying much more in the market than in the shopping centre. The markets are still great places for eating! :)