I don't think its as simple as that, we have Thorniley and potentially Robson to use as a swap deal, which means the release clause is effectively pointless in the negotiations. Additioanlly, we've sold a few players and taken some off the books, most likely to free up funds for an improved offer - we're in a slightly different position now than when the first bid came in.
I go back to the same point though, we must be getting something back from these bids otherwise we wouldn't bother pursuing. I know you guys are adamant about meeting the release clause otherwise he isn't for sale, but judging by the 4th (I think) bid coming in so soon after the last, and the time its taking to reject, it doesn't feel like the shop is shut - but who knows.