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Just a few suggestions, people can add more as they need to.
Most item descriptions include shipping weight, but not always item weight. If I'm shopping for indoor flying, the weight of each component is far more important to me than the postage cost.
On the subject of postage, I am very reluctant to place an order with the China warehouse due to the way postage costs are calculated. I can put in an order for a small brushless motor, Rx, ESC and several servos, that weighs less than 25 grams - but I have to pay the same postage costs as another box weighing 30kg. I know it makes postage a lot easier, but charging everyone the highest rate doesn't encourage sales. How about breaking it up into 1kg, 8kg, and 30kg?