I'm almost out of SAS drives... may just set them aside. (two 300 , 1 600 still running)
The worst workload these drives will see is hosting VMs on a test box or home server system. No daily SQL grind or constant thrashing. I was considering a 2 SSD stripe both for capacity and to distribute load.
$50 for a used 300g HP 10k SFF - probably get one or two and rebuilld R5 or go R10
$16 for a new 146g HP 10k SFF - might as well put all 8 in an R10
$80 for a new 240g SSD (consumer, WD blue) - probably get one or two
$55 for a new Seagate 1TB laptop drive - probably 2 or 4, but I'll need another tray
If I move this box to our colo, the noise, power draw and heat from the drives is a non-issue. If I take it home, well, I think I'll be better off selling it and getting a quieter box for that.