What you actually pay for something is at least twice the listed price because of the energy， time， money needed to set it up， learn， maintain， repair， and dispose of at the end. Not all prices appear on labels. Actual costs are 2x listed prices.
【释义】如果得到的利益非常轻松便捷，这是吉祥的预兆，但小人不应轻易接受。这种情况往往是对方贱卖自己不需要的东西，却用高价换取你的宝贵物质。别人剩余的正是你的损失，因被贼夺而得的不义之物会带来祸患；虽侥幸得之反而会招来灾难。按正当分配获得的利益是吉祥的；经过曲折努力才得到的才是真正的福祉。
The greatest threat to our planet is the belief that someone else will save it.