What is volvo specialist? A dealer?
What did they do? You have an itemised invoice.
This car is going to need lots of maintenance as it is old.
If previous owner only did things like oils and filter etc then the cost on purchase of the old bricks is about $2000 in parts to make it like new again.
If you cant do the work yourself and parts are bought in Australia by a shop and they install them then probably , oooh , $8K? on top of purchase price.
If you dont repair all that that entails you will be chasing issues and costing more anyway.