That's not really how transfers work though. For some part it does I suppose, i.e. Bale's price would of been dictated by Neymar/Ronaldo etc but it's not a simple case of "Livermore cost 8m so Cleverley is 9m" there's various factors in the deal.
Cleverley isn't really needed at United anymore if the press are to be believed, that would lower his value somewhat as the club want him off the books (freeing up wages and getting a fee for him) for example. There's other factors to, how marketable they are, how much the other club needs them, how much competition there is from others to sign him wuich may increase the deal.
Someone like Cleverley who's a bit of a laughing stock really and the butt of jokes for United fans doesn't really have that much of a demand to have a high transfer fee I'd say. At the moment he's really seen to be punching above his weight and at a bit of a crossroads in his career. This could be a good move for him but he could also just end up as another player like Keiran Richardson for example just floating around average premier league/championship clubs.