Also not a SF guy. There are free calculators. My favorite one so far is keeptradecut.com. They croudsource their rankings by asking you to rank 3 players/picks each time you open the calculator. (You can also just rank players if you want, or view a list of values.) It has 2 separate rankings: 1 QB 0.5 PPR dynasty, and SF. When you use the calculator, it will add a value adjustment to one side to attempt to counter problems, and I think it does a pretty decent job of it. "Problems" are things such as, trading 13 guys that are barely roster-worthy being equal in value to, say, DK Metcalf. If you try that with this calculator, it will add a massive adjustment increasing the value of Metcalf, so that it looks correctly uneven.