Hubby and I got married at the registry office in Melbourne. It's in the Old Treasury Building, absolutely gorgeous! You can choose between the 8 guest room and the 60 guest room, and the charge depends on which room you pick and what time of day. Weekdays are cheapest, with Friday afternoons and Saturdays the most expensive. We used the 60 guest room on a Saturday arvo and the charge was a tiny $305. The 8 guest room on a weekday is around $185. Certainly a very affordable and simple option! We only had five months to plan our wedding, so were quite relieved to not shop around for venues and celebrants, or do any pre-marriage counselling.