[jodrellblank]

That's a total of 1-4Tb. New cost for 4Tb is $220 using two of these http://www.newegg.com/Product/Product.aspx?Item=N82E16822148...

10 drives will need a hefty controller, and some mounting system, and they will be hot, noisy and power hungry.

Instead of finding 10 disks and asking how you can cram them into your life, ask what you want in your life and go and get the things that needs. If the disks aren't in there, get rid of them.