Could you give me a discount?
Won't you make it cheaper for me?
Could you give me a discount?
Would you mind turning down the volume?
I don't suppose you can [could] lend me some money. [?]
Can't you take something off (the price)?
Couldn't you make it convenient to lend me the money?
Could I have the bill, please?
Can you spare me a few minutes? 2, 3