Startup Idea : Rent Luggage Space

You are going back home from your holiday, and you start packing. You then realize that you have overbought your things! Your baggage exceeds the maximum limit wayy too much. You go online to check the excess baggage fees, and you realize you could buy a plane with that amount. What do you do? Here is the solution: an app where people can rent their baggage space. So for example if I am going Singapore (where I live) from Thailand, I log in, and check if there is anyone going Singapore. More details are in my head. This can be used in other purposes too. For example, if someone is coming to your country from country A, and you need something from there, this someone could be your delivery man! It's a win-win situation! Do give me some feedbacks!