Global Clothing Price Tracker

I need a comprehensive price tracking tool for clothing on major e-commerce platforms including Amazon, eBay, and Walmart.

Essential Features:
- Price Change Notifications: Alerts for any price changes on tracked items.
- Price Comparison: Show prices for the same item across all three platforms.

Ideal Skills and Experience:
- Experience in developing price tracking tools or apps.
- Knowledge of web scraping and API integration.
- Familiarity with Amazon, eBay, and Walmart's pricing structures.

Please provide examples of similar work if possible.