Maybe Wenger is just pissing about, so he can say on 1 September 'I tried to buy, but the negotitations were too long/expensive...'.
In any case, I think even 10m for a player who is nearly 30, on massive wages, injury prone and played poorly the last 2 years is a fair deal. Very sorry to see the lad go though - many happy memories. Only issue is, no time to replace him unless we've a deal in the pipeline somewhere, either that or a youngster comes in.
In any case, this has the whiff that it might go ahead...