You gotta get your game face on, kid.
Price tags on used cars are next to meaningless. You research, research, research first (as you are doing)...then you tell 'em the max you're willing to pay. If they won't do it, you walk. Simple as that. No haggling, no fuss, no muss.
Assuming that 2002 SLE is at a name-brand dealership, has a spotless carfax, is in showroom condition, is loaded for its trimline, and needs nothing (tires, brakes, etc), you should be able to get that, out-the-door
(meaning, including ALL
taxes, tags, fees, plus
a warranty) for $12 to $13 k.
If it'* private party or a "strip-mall" used car dealer, we're talking $8 to $9k at most (in the condition stated above, though minus the warranty).
Now, let'* assume that so-called $14k car is at a real dealership (GM, Toyota, etc.); before you even head over there, call 'em and say, "is it worth my while to come out and look if I said I think that car might be worth $12k including
all taxes, fees, warranty, etc.?" Few salesman will say no to that, for fear of losing a potential customer. Shazaam...you've just knocked the asking price down $2k (really, up to $4k considering fees/warranty) with a simple phone call...you've also got them knowing they ain't gonna be slipping in any "crap fees" on you. On the off chance they say, "no," you've saved yourself time, trouble and gas, 'cause you weren't going to pay more than that anyway.
When I bought the '04 LeSabre at a Lexus dealer in January, it was listed at like $16k (not
including TTT, fees, warranty, etc). I told the salesman I'd pay $12,500 max out-the-door
. The finance guy punches some buttons on a calculator, and says "We can do $12,520." I say, "I said $12,500 max," and got up to leave. The salesman nearly crapped a brick and actually whipped out a $20 bill
. Eventually the finance guy relented on the $20.