What's your best offer?

Meaning

What is the most favorable deal you can propose?

Examples

• John: I'm interested in buying your car.
• Alice: Okay, <b>what's your best offer</b>?
• John: I can offer $8,000.
• Alice: Hmm, let me think. What would be your best offer if we were to further discuss it? <b>What's your best offer</b> again?