He was instrumental in winning both La liga titles, I don't get all the hate. He is technically superior to Fermin, and even more versatile and more creative.
He was bought for 55+7M on a 6 years contract. With most of add-ons being unlikely met ( Fabrizio Romano words). 2 of those years have passed, let's assume we paid 2M add-one so we are at 57M.
That means 38M remaining of amortization. So while yes, we can and should get more than that, it won't be enough to warrant selling him and needing to replace him.
Silva is old and will demand bigger salary. Thanks but no thanks.