I do sometimes do the same job here in Uganda. In Uganda, more clothes are a bit cheaper than in Rwanda, since its easy to come from the mombasa port (Kenya) to Uganda, sometimes, sellers get them from Kenya and then keep them in their houses since they sometimes fail to pay taxes or have a huge quantity of clothes. so, i do reach their houses, buy the clothes at a cheaper price and then take them to rwanda. Since, Rwanda has some tight policies and goods in east africa are allowed to move freely or at a low cost, i then sell them at a higher price.