Caveat Emptor! (buyer beware)
Most 2nd hand APs for sale, were already RMA'd (returned for replacement, and no longer eligible for support).
So if they do power up, our zf7962 was our 802.11bg/an flagship until the zf7982 came out.
The last Solo AP image, is available to anyone at this link on our Support site:https://support.ruckuswireless.com/software/793-standalone-ap-software-9-8-3-0-14-all-aps
At the price today, a little PoE switch is a good option to power a couple APs and allow a couple workstations.
The benefit of BeamFlex is our antenna arrays reply back to clients using the two nearest antennas we heard
from the client on last. That way we don't direct energy all around, causing interference to other AP/clients.
Good luck with your demo.