Resent? Draco looked down at his bag again. How could the bag hold something like that? And what was 'a great deal' to Albus Dumbledore? What would it mean to someone like him? And Draco was sufficiently self-aware to know that he resented a lot of people a lot of things and that his resentment was generally rather powerful.
After the excitement he'd felt at having figured out what the key was for, after his eagerness to see what the island had in store for him, Draco was changing his mind. He already resented his father for what his life had become, resented both of his parents for forcing him to marry a Greengrass. He already wished he'd done things differently; he didn't need the piece of luggage to force it all to the forefront of his mind, to force him to experience it more acutely than he already did.
It took a few moments of looking back and forth between Albus and the luggage on his bed to make up his mind. Draco took his luggage and shoved it back under his bed.