E-Commerce Price Comparison Automation

I am seeking a freelancer to develop a system for comparing prices of different products across various e-commerce websites. The requirements are outlined below:

- The system must automatically pull and update product pricing information from multiple online sources.
- The application should identify and clearly highlight any price differences.
- An intuitive interface that enables easy viewing and understanding of the price comparisons is preferred.
- The ability to handle with cases such as CAPTCHA, implementing delays upon request, and to avoid being blocked.
It would really help if you have prior experience in the e-commerce sector along with skills in web scraping, data mining, and automation. Familiarity with APIs of popular e-commerce platforms like Amazon, eBay, or Alibaba will be considered a distinct advantage.

The ultimate goal is to create a tool that helps me simultaneously keep track of various product prices, identify the best deals available, and make informed purchasing decisions. Let's help shoppers save money and time!