On one of the podcasts, Andy Mitten said something along the lines of "The fee from Havertz to Chelsea may set the expectation in the market for Sancho to United"
I apologise if I have misquoted that a bit, but basically that the fee used in that deal would set the tone for the market.
If that's the case, 70m euro - (£65m ish?) is a good deal for someone who was quoted at approx £100m recently.
Maybe Dortmund will see that their valuation is stupid. It's almost double what Kai Havertz is going for