Compared with ebay

Warranty issues may arise if you buy this product online because eBay only offers 1 month return period and you have up to 60 days to leave your rating reviews and feedback to the seller. Since then, e-commerce platforms such as eBay are no longer binding on sellers. Even if the seller originally claimed a one-year warranty, they may not necessarily reply to you, and you have nowhere to complain at this time. If the seller can provide a warranty, you also need to pay for the shipping cost of the product back and forth (some sellers even require you to send the product back to the manufacturer in China to increase the return threshold). And every time it needs to be disassembled, replaced, and reinstalled, some additional labor costs will be generated.

Many people who buy products on ebay have encountered this problem when they need warranty

https://community.ebay.com/t5/Ask-a-Mentor/Seller-will-not-honor-a-warranty/td-p/33477133

https://community.ebay.com/t5/Buying/How-to-report-a-seller-that-doesn-t-honor-a-warranty/td-p/33025292

https://community.ebay.com/t5/Returns/PROBLEM-WITH-SELLER-NOT-HONORING-A-WARRANTY/td-p/32456275