If you know any cantonese that i will be able to use in bargaining at hongkong please write it

oh dear, Cantonese is very difficult to pronounce, try to write, let's say ,if the price is 100, u write down 60, n he will write 80, than u write 90, he would say "deal"

In Cantonese, says "piang di la, em koi"
"piang" means cheap.
"piang di" means cheaper or lower price
"piang di la", Hong Kong people like to add a "la" at the end of the verbs.
"em koi" means please or thank you.

You should say: Pan Di La....

Say first , "Taai gwai la". Meaning it's expensive, then say "Peng di dak umm dak a?" It means can you lower the price you don't want to or you want to?

or you can ask for a discount which would be, "yau mo jit tao da a?" (Do you have or haven't a discount) Sorry but that is how they talk.

If you hear them say, "MO Lah" Mo, means no more.

You can also give the price you want and see if the seller agrees to it so memorizing the numbers would be helpful. You can also say, "Nay sek umm sek kong ying wun a?" That means can or can't you speak English, it would be relatively easier to haggle because a lot of them know English.