Is it worth to buy item in large quantity (50-100+) at aliexpress or alibaba and than resell on amazon/ebay. I have 5-20k CAD that I would like to invest , or its better to do dropshipping ? I have no reputations on amazon/ebay, its going to be an issue to sell on those platforms ? Is there a way to calcul the customs fees ? Should I avoid to buy electronics on those China websites ?