According to an acknowledged Spurs ITK the 3 main interested parties for Berbatov are the 'Italian,Yank and Spainard' (sp), which I presume means one of the Milan clubs, MUFC and Barca.
I imagine that he'd be willing to join any of those clubs, so as far as Spurs are concerned, and if this info. is accurate, it will be a likely just be question of which one meets (or has already met) the asking price.
From what other Spurs ITKs have previously said, the minimum asking price is less if he goes abroad, but significantly more if he goes to a Prem club.
The Spurs ITK I mentioned above seems pretty sure (tho' his style of passing on info is eccentric, so it's often hard to tell) that Berbatov will go to one of these three. If true, I'd guess this means that at least one of these clubs (and very possibly all three) have met this asking price - but that's just speculation on my part.
If all three clubs have met the minimum asking price, it would likely just be a question of which one is willing to pay the most beyond that minimum. In which case, if Fergie really really wants Berbatov then he has competition (if this info. is correct) and will have to bite the bullet: it won't be cheap.
For reasons I won't go into I'm not vouching 100% for this info (but nor am I saying it's wrong) - just throwing it into the mix for consideration.