I am all for blaming Dorion for anything and everything he did to this organization, but regardless of the position Dorion put Staois in, there is a certain price point at which I think Staois is better off just saying "no". Yes, you risk no return at all (though there's also a chance Florida comes back around in the next 48 hours and pays up), but at least you start to establish a reputation as a GM who will hold firm on what he feels is a fair price.
The only reason to accept this deal 48 hours out from the deadline is if you're doing Tarasenko a solid, but at 50% retained that's more than just a solid.