These are usually about 130$ plus tax/ship on top of a 2-4 week drop ship time purchased new.
From the looks of it they are new'ish in box for most of them and discounted heavily if you buy multiples.
I have a bunch of these in my antec twelve hundred and...
I personally took off the cover/fan to plug everything in, it was a pain in the ass to get SAS cables in there.
I just used a SAS 8643 to 4 SATA/SAS break out cable with no side band:
You could easily...