Rescue the Deal on the Line

The signature was supposed to land this morning; instead the buyer is on the line telling you a competitor undercut you by twenty percent overnight and legal is drafting the kill notice. You have this one call — no callback, no email chain — to keep a contract that covers a third of your year. He wants a discount you can't give without torching the margin, and he's already half out the door, testing whether you'll cave or hold. Find the concession that costs you little and reads as huge, expose why cheaper will burn him, and close before he hangs up. Save it now, or lose the number.