2018 BMW 340i — should I negotiate the trade and purchase separately?

OP update: I got two written quotes on the 2018 BMW 340i and the out-the-door gap is bigger than the ads made it look. I screenshotted the quote for later.

Walk if they won't put it on a buyer’s order. If one piece looks too good on the 2018 BMW 340i, hunt doc fees, accessories, and the APR next. That's the part that actually changes the decision. Not gospel, but it saved me a headache. This is me being the wet blanket on purpose.

I'd want competing paper, not competing stories. Keep sale price, trade, and financing split on the 2018 BMW 340i so a “good payment” cannot bury a worse deal. Do that before you talk monthly again. Take it or leave it — that's what I'd do. PPI guy I use is booked until next week, so I'm waiting.

I'd slow the salesperson down here. If one piece looks too good on the 2018 BMW 340i, hunt doc fees, accessories, and the APR next. That's the part that actually changes the decision. Not gospel, but it saved me a headache. That's coming from doing this as an owner, not a shop. Calling insurance in the morning before I reply to the desk.