You should not. In fact, the only thing the salesman and the manager should know is that you can afford the car and that you are a serious buyer. As long as you don't make too good a deal, you should spring the card on the finance person, who was going to try and finance you through the dealership. They will probably cry foul (or certainly howl) and may decide not to honor the deal. You can offer to split the transaction fees with them if you think the mileage/points is worth it. If nothing else, you can probably get a better rate on the dealership financing by threatening to walk and tell the media about the dealership that doesn't honor its deals...
Originally posted by Craig:
Why would you discuss how you would pay for a car before you'd negotiated the price of same?
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"Sire, it is not a revolt. It is a Revolution!"