Sold one. One more available. A few years old, but excellent open source wireless router. I have flashed the appropriate DD-WRT firmware (https://dd-wrt.com/), but you could always go back to the Buffalo firmware.
Also, just being open about the condition. These have a rubber coating that is starting to fail and become sticky. It DOES NOT affect performance. Can be removed with rubbing alcohol. I have cleaned them, but they will almost assuredly need more cleaning as the coating wears off.
From the website:
Buffalo's AirStation Extreme AC1750 Gigabit Dual Band Wireless Router offers high speed dual band wireless connectivity, delivering the latest in Wi-Fi technology. It offers a new class of features, above and beyond the traditional home router.
- Next generation wireless 802.11ac
- Speeds up to 1750 Mbps (AC1300 + N450)*†
- Allows up to 4 simultaneous gigabit wired connections
- HighPower technology improves coverage and reduces or eliminates dead spots
- Implicit Beamforming optimizes signal energy for enhanced operation
- Simple to install and use - even for the novice user
- Configure and use from smartphone and tablet devices
- Wireless security - AOSS/WPS support
- Web Filtering and Parental Control by Symantec™ restricts unsafe content
- Priority Control QoS automatically prioritizes traffic according to user's preference
- USB 3.0 accessory port for NAS and USB 2.0 for printer capabilities
- Backward compatible with 802.11n/a/g/b devices
- Configure as an access point or wireless bridge