Used but very good/excellent condition, comes with box. Runs OpenWRT without issue but reset to factory with OEM firmware for you. Other open source compatible but YMMV. Upgraded home network, price OBO, e-mail only. Thank you.
https://www.linksys.com/support-product?sku=WRT3200ACM
https://openwrt.org/toh/linksys/wrt3200acm