You interview your friend about his/her hobbies
example :
A: Excuse me miss, may I see the bag over there?
B: The blue one? Of course. Here it is.
A: Well, how much does it cost? I think I'd like to buy this one.
B: This one is Rp100.000-, sir.
A: Are you kidding me? It's too expensive for the bag like this. How about Rp75.000-,?
B: Well, I can't sell it in that price.
A: Rp100.000-, is too high. Can you give me a lower price?
B: Rp80.000. That's all.
A: Okay, I'll take it.
B: Thank you, sir. Come again next time.