Realistically, I can't see Helium being used in consumer grade drives.
If it was ever offered, I would not want to own such a drive.
Helium is one element that is extremely difficult to contain and is known to leak from sealed environments. A small microscopic crack in the casing or seal...
Don't have any for sale.
A couple things you might want to think about when it comes to Toshiba.
The retail package on these drives may have warranties listed from 2-3 years. (warranty check)
Toshiba requires a receipt/proof of purchase to RMA.
If you are buying used drives with...
Looking for deals on used Hitachi or HGST 2TB, 3TB, 4TB drives..
Coolspin preferred, but 7200 rpm is ok
NAS data included, but I'm guessing people will ask too much for these.
Toshiba drives might also be considered if you have an original retail cash receipt without a name/mailing...