I don’t know for sure, how big or trustworthy “Negri Electronics” is a name there in USA, but good news is that they have opened Lumia 920 pre-orders at a sim-free price of $698.59. Though no shipping or delivery date is mentioned. This looks like an indicative price for USA considering the unlocked Lumia 920 prices in Europe. So, in case if you are more interested in unlocked signature Yellow Lumia 920 and above price is cool with you, then Negri is the way to go as of now.

Pre-order page