In Porto, one has many options for film-based photography shops. Perhaps not the most distinguished of the options is a little shop called "Máquinas de Outros Tempos". It's humble in a lot of ways but, distinguished or not, the selection of cameras from another time is large and the service is first-rate. (The prices are competitive as well.) I picked up a Rollei 35 there that turned out to have issues. I returned it and received an exchange in better condition, with some extras. I am very satisfied with the somewhat extended transaction and, after many years of pining, now have a wonderful little pocket-camera.