I already have a store with sporting goods and I want to try dropshipping via eBay with AliExpress. I'm wondering how best to organize the process from product selection to shipping so that I don't have any problems with shipping and customers. Does anyone have any experience or advice on this?

Here's a link that has a detailed guide that explains how to dropship on eBay from AliExpress - from product selection to check out. It will help you understand the basic steps and nuances so you don't fall into pitfalls, especially with shipping and markups. If you're planning to get serious about it, you can take a look here, it's all laid out step by step: how to search for goods, negotiate with suppliers and not to get your account blocked.

I would advise you to start with small batches and test how the demand goes. The demand for sporting goods is usually stable, but it's better to strategize in advance to see which products are more popular

Hey! Dropshipping sporting goods on eBay via AliExpress can be tricky, but it's doable. Definitely check out that link the other person mentioned.