"O...Offer? That's not how this works! You give me a price and I let you know if I'm willing to pay it! Haggling might be involved! You can't pull this on me, I was a demon for hundreds of years, I made thousands, no, millions of deals! So... so you tell me, bub!"

She's standing, hands on hips, looking rather like a housewife negotiating with a problematic three year old.