You can buy the Piaggio MP3 300 Yourban from authorized Piaggio dealerships, as well as through online platforms and specialty scooter shops. For specific locations, you can visit the official Piaggio website to find a local dealer. Additionally, some online retailers and forums, such as those mentioned on Maxabout, may provide information on where to purchase the MP3 300 Yourban. Original accessories and spare parts can also be obtained from Piaggio's official online shop or through retailers like Piaggio-Vespa RWN.