I think between 500k and 1m is probably right. But in a cost/benefit analysis, I don't see how it makes much sense to sell. Players like Atkinson or Baptiste you can see being sold to support the club and 'support the model'. I'm fully behind that, as I think most of us are. But if Stevens were to go for that amount, you would have to ask whether it reflects his value to the club, both on and off the pitch, at this moment in time.
Off the pitch, as I say, I accept that players need to be sold every year. But given we have already two players this summer by, for all accounts, nearly £2m, is an additional 500k really going to make that much of a difference to the club's financial situation? I wouldn't have thought so. His contract situation means there's no need to take the money and run, either. On the pitch, I think Stevens is worth more to us than 500k-1m. Good keepers, at any level, are really tough to come by. Once you find one, you can't take them for granted. We've been pretty lucky in recent years in that we've had Clarkey and then Eastwood and then Stevens who we could hang our hats on, but even in the interim periods, or when Eastwood lost form, we've seen how damaging a subpar keeper can be. Remember Mitchell? Shearer? Hell, the 15-16 squad, probably the relative best in terms of the level it was playing at that most of us have ever seen in Oxford shirts, didn't guarantee promotion until the second half of the final game of the season in part because it was stuck with Slocombe and then Buchel between the sticks for the year! It literally loses you games, in a way a subpar option in any other position just doesn't.
I appreciate that its the 'going rate', and Easty can be (although by no means will be) a solid replacement, but I would be pretty disappointed if this were to go through. If we don't need to sell, and we don't have to sell, I would like to see us stand firm on this.
EDIT To clarify, the above refers to if the price is in that 500-1m range. Anything above that and I don't think the club is in a position to turn it down. £1m+ is a lot of money.