For in-store pickup, Best Buy offers the Seagate FreeAgent GoFlex Desk 3TB USB 3.0 External Desktop Hard Drive, model no. STAC3000102, for $99.99 ($0.03/GB). That's tied with yesterday's mention as the least expensive 3TB USB 3.0 external hard drive we've seen. (It's also a current price low by $76.) Sales tax is added where applicable.