3Com 3C16611 Help

Its a SuperStack II 24 Port Dual Sensing Hub, i dont know in what way can help me administer my network better but is an $500-$900 equipment and i would like to be able to use it better then today?

What can i do with it? why is it priced that high?

If everything fails do you guys think i could sell it thru eBay or something and get a normal Switch or HUB?

right now we are a 30+ People Production Plant, and the only administring job i would like to make is i want to limit people to access only the inner network and not the intranet or internet. Would this help?

I didnt know i was sitting in that equipment, right now i dont have use for it because my CISCO Switch has all 22 connected nodes.