You're missing the point entirely.
You're buying OLD 846 chassis, not the new ones.
The old ones had SAS1 backplanes.
So, if you're buying them "AS IS" from ebay and not asking... then you get what you get.
As someone who's ordered a # of them I was simply sharing my experience and trying to help you get what you wanted.
if your stick on OP deals, this is NOT old 846, but used recent 846,
please check the first posting.
this is the second link description on ebay auction: Supermicro SC846E16-R1200B 24 Bay 4U Chassis 2x 1200Watt PSU and Rail Kit
I am sure, this is not old 846, please check on supermicro site.
when a new model coming, the model# will differenet, you can compared model# sas1 and sas2 model server case.
as long the seller point the model#, you must get that model!, unlesss there is fine-print such as with 800W PSU(further looking, everyone know this is old PSU)
I had been good experience with some ebay seller and some bad.
the last good one is, the auction was not including trays, but I pm them and mentioned including trays. At the end, they sent me free trays .
first rule first, pm the seller first to verify, and this can be your ammo when something goes sour.
I PMed the seller months ago ($250+shipping), with all the info, and the seller described as identical what I posted here.