If you buy a fake guitar on Taobao, here's what to do:

1. Identify the Issue: Confirm that the guitar is indeed fake by comparing it with authentic product images, specifications, and reviews. Look for discrepancies in the build quality, materials, and brand markings.

2. Report the Seller: Use Taobao's reporting system to flag the seller for selling counterfeit goods. Provide evidence of the fake product, such as photos and descriptions.

3. Request a Refund: Contact the seller and request a refund. If the seller refuses, file a dispute through Taobao's customer service.

4. Document the Incident: Keep records of all communication with the seller and Taobao's customer service. This documentation can be crucial if you need to escalate the issue.

5. Seek Legal Advice: If the issue is not resolved, consider seeking legal advice. Counterfeit goods are illegal, and you may have grounds for a lawsuit.

The reason for these steps is that buying a fake guitar can be a costly mistake. According to a report by the International Trade Commission, counterfeit goods accounted for $46 billion in losses to the U.S. economy in 2019. This includes not only financial losses but also the potential for safety hazards and the erosion of consumer trust in legitimate brands. By following these steps, you can protect yourself from these risks and help combat the sale of counterfeit goods.