She mentions multiple times in the books that she despises expensive gifts, and the ones that actually leave an impact on are her Chevy and the wooden wolf bracelet Jacob gives her. The Chevy is second-hand from Billy, and the bracelet was carved by Jacob. They hold value to her because they have personality; they speak to her tastes and were given to her with those tastes in mind.

She loves her Chevy, but it is eventually replaced with a sleek, expensive designer car gifted to her by the Cullens. She adores the bracelet but Edward puts an designer charm on it to remind her of him.

Even her clothes, which she insists are fine and suit her, are replaced with branded sweaters, dresses and heels.

She hates the idea of any kind of marriage but Edward holds vampirism over her head to get what he wants. Even when she agrees to marry him (against her will) she wants to keep it simple, wanting to simply drive to Texas and get married via a drive thru- Alice begs Bella to allow her to plan the wedding and it's easily more ostentacious and expensive than her birthday party in New Moon, which she describes as "a hundred times worse than I'd imagined"

They get rid of her preferred aesthetics in hopes that their consumerist one will stick, and one of the last things they do to her is literally strip her of her humanity.

He’s warning you