How to talk about giving kickbacks to each other

This is usually said naturally in appropriate occasions, such as: this price is 280 thousand, leaving you 50 thousand in the middle. Or: This reserve price is 200,000 yuan, and our general market price is 280,000 yuan. You can add your own works.

Of course, it depends on the actual situation. For example, you can say: I keep your chess pieces or something, or when the other party bargains with you, just throw them out: then I can't keep your chess pieces for you.

Anyway, try to be natural and let the other person know that you know the rules. The exact number will depend on the other party's reaction.