I picked one up for $350 so I’m extremely pleased. I just copied 264 GB to it in just under an hour so I’m getting a transfer rate of 4.7 GB/min. I’ve very pleased with with that. I’m even moving Time Machine over to the Drobo 5N as well.
Added icing is the cake is the extra functionality of Drobo Dashboard with info for the drives and such. 2 year warranty as well.