Cheap car hire in Thessaloniki

We'd like to rent a car in Thessaloniki but rather with a local agency.
We've done it before in Bulgaria and Hungary and it was quite a good deal: it was not only cheaper than Avis or Budget but the car also looked much more "autochthon' and therefore less appealing to car thieves...
So if anyone knows of a reliable car hire in Thessaloniki that we can contact per e-mail, please let me know!
Thank you very much!