I recently purchased 6 white label drives that were labeled similar to this one, but the label on mine had "ENTERPRISE" class printed on the label. The model number for the ones I purchased were "WL3000GSA6472E". From what I have been able to put together, the model I purchased are Western Digital drives whose specs place them somewhere in the RED or the GOLD class.
This one has the model number WL3000GSA6472-ST, where ST could stand for standard desktop drive. Or it could stand for Seagate. So you may not know what manufacture you will get, only that it is a 3tb 7200rpm SATA drive with 64MB of Cache. You could buy 5 of these and get drives from 3 different manufactures. I have actually had this happen.
Now whether or not they are unused and brand new or they are refurbished from server end of lease pulls, that I can not tell you. So far I have not had any major issue with any of the white label drives in the past. As long as they come with at leat a one year warranty, personally they are worth the money.