For those with a trade-in - my uncle, a former car salesman, adds this: "Pick out a car, negotiate your best price, take your time. The day you're supposed to

For those with a trade-in - my uncle, a former car salesman, adds this: "Pick out a car, negotiate your best price, take your time. The day you're supposed to pick it up, call them up and say, "I thought my vehicle was worth more, I think it's worth $1000 more." In their mind, that car is sold, the manager counted it, the salesperson is counting their commission already, and the minute you turn it around on them, they will not let that sale go. If they can give you another $500, trust me - they'll do it."