Tua’s value in a full point superflex

Hi guys I’ve been offered Miles Sanders for Tua but I feel I should be getting more. I can let Tua go as I’ve Mahomes, Burrow, Carr, Big Ben and Fitzmagic. I’m not deep at RB I’ve Mixon and Chubb as my lead backs with Connor in the flex but after that there’s a big drop off . Should I ask for a rookie draft pick aswell. He doesn’t have a 2 next year as he traded it, would his 1 be too rich ?