So far	DNSbox
Registration fee of registrar or registry*	20€	20€
Monthly or annual fee per domain	25€	25€
Fee for changes of registrar	45€	0€
Possible loss due to unavailability (2 mandays)	300€	0€
DNSbox© (cheapest rate, 12 months)		9,95€
Average costs per year	390€	54,95€

* average prices for Germany (.de domain)