So I seen this and thought it was very cheap considering it was filled with drives as well so made an impulse buy.
http://www.trademe.co.nz/Browse/Listing.aspx?id=837308760
Seller was fantastic and shipped to me the full packaging it originally came in which is always handy to have.
Came with 4 2tb hd's however I have taken them out and put in 4 wd 3tb greens. I hoard alot of television episodes so have moved everything I had over to the drobo , took quite some time to move 3.7tb of shows but now its all done found the system to be quite good.
I used the 4 2tb drives that came with the unit to backup all my data just in case the drobo falls over but for the price I paid I am pretty happy with it even though it is an old gen 2 model and is pretty slow.
Anybody else use these at all ??