And, now, finally, as I predicted, the price rapidly rose on external ultra-portable (USB powered) 2.5" drives. Prices skyrocketed today (maybe yesterday), some models nearly doubling in price overnight. I don't know why yesterday, but they did. I had been waiting for the speculators and retailers to 'notice' that, hey, these are hard drives too, made in the same places as all those drives marked up so high ;p.
While monitoring this, I have noticed one thing in particular: Amazon or eBay always carries the lowest price, many/most of the other *big* online retailers have jacked up the prices on all HDDs artificially, including these (now).
This applies to all brands, makes, and models.
I have also noticed that past a certain point (about 2x the original price), most consumers are simply refusing to buy. However, some will have no choice in the end if building Christmas PCs, though they may take cheaper options or go for less storage.