If you are looking for the cheapest place to purchase your domain, Cloudflare is the best domain registrar in 2022. You’re not going to find a less expensive option out there because Cloudflare earns $0 on its domain name registrar business.
Purchase a domain from Cloudflare: https://www.cloudflare.com/products/registrar
Registrar for Everyone (2021): https://blog.cloudflare.com/registrar-for-everyone
Introducing Cloudflare Registrar: Domain Registration You Can Love: https://blog.cloudflare.com/cloudflare-registrar/