Just about every dealership has all their inventory online now. I was looking for a specific Boxter with a detachable hard top and found one across the river. I tried the big web sites at the beginning but their info was so incomplete it was frustrating. Third party is good in theory but you don’t know how up to date it is.
my last two cars were purchased through them, they get the best price from all the area dealers and do the negotiating for you..
Last time I was shopping for a car I had good luck with Yahoo Autos.