It's a good deal, but isn't too hot. Prices for these external hard drives have come down greatly since Black Friday 2012. This drive was $59.99 a couple weeks ago, and it's been at the $69.99 price point at least twice in the last two weeks.
If you're in need of the drive, I'd pick it up though. Getting it through Costco is more hassle-free than most online sellers.
Hope this helps,