I don't think they're holding out for as much as that, their own sporting director told the BBC publicly that it will most likely be in the 30s:
"It's probably going to start with a number three in front of it and that will give us great opportunities to maybe make the whole squad better as well. We’re really relaxed on that front."
If we want to we should be able to get this one over the line pretty quickly. Norwich seem to know that he'll be leaving this summer, their price tag isn't unreasonably high (like Palace and Zaha), and there isn't a ton of high profile competition.