Hopefully you've done all the inspections and checks with a fine-toothed comb before you ever actually gave them any serious amount of money. Once they have your money, you are reduced to relying on the good will of the dealership to have problems addressed. Not good.
A salesman eager to make a sale will tell you many things, some of which may be true. And maybe they sidestep the truth by telling you they "run it through a x number of points inspection before reselling it", but don't elaborate by saying they don't necessarily fix things they found wrong.
There are several posters on here who have a PDI(Pre Delivery Inspection) list of things to check. I'm sure some of them will stop by with their help.