Last year I faced a big difficulty related to rent a car to cross-border in Balkans because I found that prices really increase if you need to cross borders.
Here, in Trip Advisor, I found some posts from Anon S, from Marrakech, and Jason D, from London, both in https://www.tripadvisor.in/ShowTopic-g294451… Topic, sharing their experiences and I decided to reach Danny Rangelova from Hire My Car bg, a small company based in Sofia.
It worked as it was supposed and Danny was very helpful, warm in her welcome and available to solve any question we had. The car was perfect for us because for its discreet, it was not a new one. In Greece, our destination, we planned to park it for 6 days and assure that will not be "disturbed". And the price was quite good compared to the other companies.