The first is that everything Rocket League Credits you place in the Drop-off Box will sell for 20%, then its usual selling price. This means that you will lose Bells if you decide to place items in the Drop-off Box.

The second disadvantage is that you will have to wait till the next day to receive your Bells.

If you do place anything within the RL Items Drop-off Box, you'll receive a phone call from the twins the next day, during which they'll tell you exactly how much you've earned. Yo.