That picture is fine.
I'd say 99.999% of the images I put on entries are from other websites. Just make sure that the picture is of the item itself and does not include things besides it. For example, if it is cart art, the picture for that should just be of the cart, not the card inside of a tray or with other things in the background. Front should be front, not front and spine, back should be back, etc. Also no watermarks.