The registration fee that is paid to the ens dao varies on length. Shorter names are much more expensive. But for 5 characters or more, its 'only' $5 per year.

The registration fee that is paid to the ens dao varies on length. Shorter names are much more expensive. But for 5 characters or more, its 'only' $5 per year. What is expensive is the gas fees to claim the name, mint the NFT to complete the registration, and then set a reverse resolver for it. Even at lowish gas fees it can be $50-$100.