Click to enlarge the picture below for details on the condition of each drive... 4 are out of warranty and 4 have warranties remaining until the end of March 2016.
Each sticky note lists the following:
A. Drive number (pick a drive by number if you want to buy any of them)
B. Warranty status / end date (just verified this info on Seagate's site)
C. CrystalDiskInfo Health Status (all are good)
D. CrystalDiskInfo Power On Count
E. CrystalDiskInfo Hour Count
Price:
Each of the four drives in warranty: $45 OBO shipped in the US
Each of the four drives out of warranty $35 OBO shipped in the US
Take all eight drives for $250 shipped and I'll throw in the padded gun case style holder shown in the picture
All drives will be well padded / protected before shipping.
Not sure on trades, but I'd look at a list I suppose.