There are three key reasons why you should purchase the item for the buyer:
Since you will be purchasing the item yourself, you will know what you are packing. However, make sure that the item is allowed for import into the country you are traveling to. Here is information on importing prohibited items.
Follow the instructions below and always stay in touch with your buyers so they know how you plan to deliver their item. If you plan to bring the item without the original packaging, it is better to inform the buyer in advance. Here is how Parlaxy recommends packing your suitcase: