Ajax currently have Davinson Sanchez angling for a move and have already received transfer fees for other players so have no need to sell.
Whilst I agree, Ajax almost never have a need to spend they finish almost every transfer window with a negative net-spend.
We were very swift with the Klassen deal, Koeman probably still have links at Ajax and if they players asks to leave they could be inclined to sell, every player has their price.
I can't see him signing for us nonetheless but I'd love us to really try and sign him I think he's already class and still has so much potential. I'd be absolutely ecstatic if we were able to sign him.