We bought an entire phone system for $20 - NEC Univerge SV8100 First Look

I've been wanting to upgrade the TV station's current setup of multiple POTS phones to a proper key system. I offered my old Norstar 6x16, but then this system, complete with 9 phones, showed up for just $20 on Facebook Marketplace. We jumped at it. Lets give it a once-over, connect a couple of phones, and see if it works.