First of all, you can find some suppliers through Internet search. These suppliers usually provide different kinds of balloons, from traditional round balloons to balloons with special shapes, and different sizes and colors. You can choose to place an order online and wait for the supplier to deliver the balloon to your door. But this method may be risky, because you can't confirm the quality and appearance of the balloon before the real thing.

The second method is to find a local balloon wholesaler. These wholesalers usually have offices and warehouses in commercial or industrial areas, providing a large supply of balloons. In these wholesalers, you can see the real things, check the quality and color of balloons, and negotiate the price and transportation arrangements with the sales staff. This method is usually more reliable, because you can personally check and select balloons, and you can communicate and negotiate directly with the sales staff.

Finally, you can also consider contacting the balloon manufacturer directly. This method needs more time and resources, because you need to know the contact information of balloon manufacturers and communicate with them. But direct cooperation with manufacturers can gain more advantages, such as customized balloons, lower prices and better service.

To sum up, there are many ways to find the purchase channel for selling balloons. No matter which way you choose, you should consider factors such as quality, price and service, and fully communicate and negotiate with suppliers or sales personnel. Only in this way can you get the most satisfactory balloon products and services.