A: I`d like to know the cost of …?
Would you please tell me the price of …?
What`s the price for …?
How about the cost of …?
What`s your budget for…?
Can you lower the price?
Can you give me a special price?
Could you come up with a better discount?
B: The price of a standard booth is…
Our budget for a standard booth is…
The minimum/maximum cost for attending the exhibition is…
The price varies according to…
I`m sorry, I can`t. That`s the lowest I can go.
C: I`d like to book the booth now.
This is the kind of booth I`m looking for. And the price is reasonable.
I`ll take it.