Given we allegedly attempted a swap deal involving Kounde and Davinson Sanchez, I would imagine a valuation of Davinson has already been loosely agreed beween Paratici & Monchi.
So, if Kounde does go to chavski, then theoretically this could be done pretty quickly, as Davinson & his agent seem open to the move.
Personally, once a deal is there to be made, I'd seal it pretty quickly. But I fear if Sevilla get a big transfer fee for Kounde, Levy may decide to intervene & renegotiate in his traditional & tiresome fashion.