I've recently purchased a UAP AC HD off another GZ'er and no longer require my old RT-AC68U.

I purchased it 11 Nov, 2013 so it's getting on almost 6 years old, unsure on what the expected lifespan would be, but it's been performing as a router well enough until I replaced it with an RB4011 a few months ago, and as an AP until yesterday.

I figure given the age of the unit, although it's in good working condition right now it's pretty much an as-is where-is deal, so if you want a cheap router or to use Asus Mesh with other compatible Asus Routers, it's yoursfor $150 OBO + Postage, or you can pick it up from me in Hamilton CBD.

edit: Forgot to mention - it's running a fairly recent version of Asus-WRT Merlin, I can flash it back to stock or the latest of Merlin before sending it, just let me know what you want.