Likely later this year, too late for you since you need one now -- but there are frequent sales on specific models so watch for them at Newegg and other online retailers. If you need a big storage drive 3tb 7200 rpm for $170 take the drive out of this external, which was a good price before the flooding in Thailand.
That's just an opinion piece, who really know when the manipulators will have to let prices fall to sell their wares, only time will tell. Personally, I need another 8 3tb drives for an array, but I can wait so I will. Let's try to be nice.