What prices have you seen? And which domain zone did you choose?
You may have looked at the promotional prices of some registrars. Please note a domain cannot be too cheap. If it really is worth it, then these registrars will charge a high price for domain renewals. This price may even be too high. Moreover, some registrars may hide this at the very beginning.
It is better to look for domains from the https://pananames.com/
registrar. At least this is a proven option with reasonable prices. Here renewal prices are visible immediately. And they will be relevant for many years to come.