Domain registration does not always have the same price. This fluctuation is due to the fact that each domain extension has a different cost. Especially if it is a top-level extension or if it is very popular.
However, there are services closely related to domains that provide added value that can increase their price. This is the case of services such as Domain Protection (which hides your Whois data to prevent cyber-attacks) or SSL Security Certificates.
Normally, transferring domains to Arsys costs the same as a registration. We do not charge you for paperwork or maintenance.