There are very few four letter domains available anywhere which makes them valuable.
Evus.us sold for $13,000 on 10/12/2016 at Sedo. Otec.us sold for $8,412 on 6/23/2018 at Sedo. Ckgs.us sold for $7,300 on 4/29/2021 at GoDaddy.
Minimum offer considered (USD): $3,500
We will not respond to lowball offers. At URLs.net, we offer memorable domain names with high marketing values. Nearly all were bought in the mid to late 1990’s. We recommend searching “aftermarket domain name sales history” to learn what premium domain names have sold for.