hmmmm, well I know that there were a few post on here about purchasing one if you look through the post! but the store i get them from it is 649.99 and they are unlocked but you still have shipping which can be as cheap as 15 acording to where you live. good luck!
I think it all depends whether you live in the America or the UK, (or even in another country altogether!) and also whether you are looking for an unlocked Bold or are prepared to enter into (or renew) a contract.
There is a separate thread on UK Bold pricing, mainly aimed at those who are looking for one which is unlocked and SIM free.
Edit: It also of course depends how quickly you want (or need!) one, as they are still in VERY short supply, and no unlocked ones are available in the UK at all yet.