Looking to trade James White

Full PPR. Im looking to shop him but what should I realistically expect to get… hes been a weekly RB1 now since Burkhead was sent to the IR. Should I be aiming for someone like McCaffrey? Idk how much more Id have to offer and if white can lock me in for a bottom floor of 15 with 30+ point upside (PPR)… do I even want to to offer more for caff? Thoughts on this?