HON is a big producer of office furniture. We had a ton of their desks, etc... in our old office.
Note that the terms say if you're going to pick up something that's not going to be hand carried out, you need to show them your insurance certificate before coming in and moving it. That means that you and your brother probably can't move the stationary equipment, however there are usually movers hanging around these sort of auctions who will be glad to move for you for a price.
The bigger things are the better deal... I've seen relatively immobile planars go for just a couple of hundred dollars. On the other hand, people will pay more for clamps than you can buy them new.