I preordered mine at BB last month. The advertised price with upgrade/new plan is $199. I stopped by yesterday and asked about their price match policy...I told them about Target's advertised price; they agreed to match Target's price of $179, provided that on launch date when they call Target to verify and they do have a phone available for that price.
Below is the link to Target Mobile Store for the 3D advertised for $179. Either print it out or have BB go directly to the link for quick reference.
HTC EVO 3D for Sprint - Target Mobile