Sarandë is a city in Albania. There are quite many tourists coming from island Corfu. Therefore, the prices are quite expensive comparing to the other cities in Albania. It is quite difficult to hitchhike out for free due to tourists and its location of city centre.
North towards Himarë, Vlorë, Tirana, East towards Gjirokaster
Walk a couple of kilometers south of the city, until you go in the gas station in Qafë Gjashtë. Walking to the roundabouts where SH99 meets SH8 (towards Himarë), SH98 or SH78 (towards Tirana & Gjirokastra) meet, is a very good idea as these are spacious places, cutting out most of the local traffic. However, it takes some time and effort as these are ~3km uphill, so you might consider taking a taxi there.
South towards Greece
There are two ways to go in Greece, The one from Kakavia, thats leads to Ioannina, and the other that goes in Igoumenitsa. Going to Ioannina is way more easy, because there are more cars, so avoid the other road, except if your goal is Igoumenitsa (ex: if you want to take the boat to Italy).