wait until December
wait until the last week of the month (they have to pay rent also)
Wait until Friday
Come in with cash (if buying used and less than 10k - otherwise get reported)
Keep saying All I have is this much cash.
keep saying cash, like an injection of heroin
If already have a car in mind, and they have it check edwards NOT blue book.
Just say "no" if they won't bring the price down a few grand IF paying in CASH.
Do not let on that you have more than you stated or the price will jump up during the signing.