wired vs wireless

[TexasIndian]

Just replaced this (installed new AX router); when I returned to it's original package,

discovered it's predecessor (N600) in box...now have TWO old routers with no use!

Query: can either/both of these be reconfigured to become 'extender' to new router?

Any other viable uses?  Or are they simply paperweights that I toss into the landfill??  

[plemans]

The r7000 does have an extender mode. 

https://kb.netgear.com/24108/How-do-I-enable-the-extender-mode-feature-on-my-Nighthawk-router

it also has a wide following of 3rd party firmwares. Everything from openwrt, ddwrt, to vpn firmwares like expressvpn. 

Many options for it.