I have a T-Mobile Asus router, that was modified to be a full fledged Asus RT-AC68U router, also has the latest Merlin firmware on it.
Has upgraded Asus RT-AC2900 antennas.
You can use this router in multiple ways, as a main router, extender, access point, Aimesh, media bridge, repeater.
You can extend your network, or if you have Wi-Fi dead spots, you could use this router as an Aimesh router, to get rid of those dead spots.
It is in great working and physical condition.
Comes with it's original power adapter.
During the week days, I'm available in Altadena as well, from 8-4.