You can find cheap second-hand dumbbells in major online second-hand markets, such as idle fish and Taobao second-hand platform.

There are many individuals or businesses selling second-hand fitness equipment on these second-hand platforms, and the prices are relatively low. Before buying, it is recommended to carefully check the product description, photos and seller's evaluation, and choose a seller with good reputation and detailed description. At the same time, by comparing the prices and goods of different sellers, we can find second-hand dumbbells with high cost performance.