Just had a look up to see if I could find out any info - Couldn't find a value, but an older report speculates that Spurs have a 50% sell on as well.
(Vincent Tan will love that!)
I'd look at Ince too. A lot depends on our circumstances, but if we're looking to balance the books and we have to get some more goals in our team (if Lallana is sold & J-Rod still being injured) we could do a lot worse than look at Ince.