Upvote:0
I can recommend something that I've used. My friends and I rented a car from AVIS.
The price was quite reasonable including full insurance. There were free of us in total. We rented Opel Insignia 2.0 TD for 3 days to get from Stockholm to Copengahen and this cost us 1500 Swedish krones back in May 2012. We also had our own GPS. It took us less than 15 min to get a car at the local airport.
The price will mainly depend on type of car, insurance type, amount of days, extra accessories (i.e. GPS/cables/etc)
Here are AVIS locations in Italy
>> Click Here
You may consider looking at this site as well, as it offers search from a variety of car rental services.