things that should be replaced under warranty by the dealer:
The door gaskets
PDC sensors/module (common problem)
Brake light (Common problem)

The pillars they may not do anything about but you never know....
the big gouge you should have mentioned as part of the price negotiation for this purchase. I wouldnt expect the dealer to do anything about this...

that 300+ point check is really a marketing tactic. they mainly go by mileage and book value, buy low, sell high... etc...

good luck