So what is something like this worth in this condition etc?
The only correct answer is "whatever the buyer is willing to pay".
There is no objective price on used equipment.
Joe's right.
Particularly with a piece like you have, there aren't many around to reference.
Your cabinet may be worth decent money to somebody with a 30" wide 2000S head to match up with it, but
finding that person might not be so easy.
(Uhm...were is the cabinet located geographically?)
That's the best thing about eBay, it levels the playing field.
If anybody
is looking for that beast, they
will be looking on eBay.
If you list it, somebody wins and actually
pays for it, you will then have your question answered.