Automated Product Monitoring & Alert System

I'm seeking a skilled developer to create an automated system that monitors various e-commerce websites for specific product listings and price changes. The system should be able to filter results based on price and keywords, and send real-time alerts via Discord when conditions are met.

Core Requirements:
- The system must be capable of scanning multiple online marketplaces for new product listings or price changes.
- Implement automated alerts that are sent via Discord.
- Create filters based on price and keywords.

Additional Considerations:
- The system should be designed to avoid detection and blocking from websites.
- It needs to be scalable and efficient.

Ideal Skills:
- Extensive experience with web scraping and APIs from sites like eBay Amazon and more
- Proficiency in automation and bot development.
- Skilled in handling proxies and anti-bot measures.

Please share your relevant experience and the tools or methods you would utilize for this project.