I am preparing a catalogue of the Rhodian amphora stamps in Istros (Histria VIII.3), which will also contain some considerations on the dynamics of trade links between Rhodes and Istros. As a preliminary remark, I realize that the apogee of Rhodian amphora importations corresponds to the periods III-IV. The highest ratios seem to date to c. 200-180 and 160-140 respectively. Nevertheless, it is difficult to explain these fluctuations through an historical background.