New in the box - never used, never opened, pristine and still sealed. This is Seagate Part STBC3000102. Asking $275 + $10 shipping but am open to offers and trades.
Satisfy your need for speed. Designed to meet the demands of professional media creators, Thunderbolt technology allows users to unleash their creativity using high-bandwidth audio- and video-capturing devices, while transferring data at up to 10 gigs-per-second--up to 20x the speed of USB 2.0 and 12x the speed of FireWire 800.
Dual ports enable daisy-chaining up to 6 devices
Compatible with displays and other Thunderbolt devices
Includes 1-m Thunderbolt cable
Compatible with Time Machine software
Currently have 10 of these on two chains and they have been extremely reliable and high-performance. Unfortunately, the limit is 6 and I'd rather have another monitor before more drive space so this one has to go.
If you need a drive like this and are considering selling Canon L lenses, I'd be interested to offer a trade and additional cash for the right deal.