here in europe , they never adjust price to currency. i think sony is bringing the price down here. something is coming.
If that is the case, you should make sure the reseller is an authorized Sony dealer for valid warranty. In the US, the prices only vary with "grey market" sellers who sell international versions in the US. You see this on Amazon when the item says "International Model" or "Japan Model". Sony will not give warranty on grey market items. Here is an example:
An authorized US model still goes for $3200: