large capacity hdd

Over the years I've gone from 1TB to 2TB to 4TB HDD, etc. I now have stacks of the things. I'd like to get rid of the last of my 4TB HDDs and get some 8TB HDDs, but I'm not sure which to get. (I will not be using them in any sort of RAID configuration). From reading here, I see that it's ok to...

I just had an external Seagate HDD fail... In the market now for a large capacity internal HDD. Speed doesn't matter. Somewhere in the ballpark of 8-10 TB. I have searched and searched. Places like ebay are littered with large capacity HDDs for a decent deal, but most are used, and it seems...