In the page 13 of the "learn to play" book, it says
During this step, players can also sell any Item cards that they already own. To sell a card, Rebel players receive an amount of credits equal to half the card’s cost. Then shuffle that card back into the appropriate Item deck.
However, in the page 21 of the rules reference, it says
Heroes can sell any of the Item cards they already own. Each sold card is returned to the game box.
Which sentence is correct?