Revamp Python Scraper for E-commerce Site -- 2

**Project Title: Fix and Improve Existing Python Web Scraping Script**

**Project Description:**

I have an existing Python script that collects product information from an e-commerce website and saves the results into a CSV file. The script was working previously, but recently started having some issues.

I'm looking for a Python developer to debug the existing code, fix the problems, and make a few small improvements.

**Current Issues:**
- Some products are missing from the exported CSV.
- The script occasionally stops when a request fails or times out.
- Duplicate products sometimes appear in the results.
- Certain product prices are not extracted correctly.

**What I Need:**
- Review and fix the existing Python script.
- Make sure product names, prices, URLs, and availability are extracted correctly.
- Add basic retry handling for failed requests.
- Prevent duplicate records in the CSV.
- Add simple logging so I can identify errors.
- Keep the existing code structure where possible.

**Expected Deliverables:**
- Updated, working Python script.
- Correctly formatted CSV output.
- Brief explanation of the changes.
- Basic instructions for running the script locally.

**Additional Information:**

The script currently uses Python, Requests, and BeautifulSoup. I will provide the existing code and sample output to the selected freelancer.

This is a small, fixed-price task rather than a complete rebuild. I'm looking for someone who can identify the problems and implement practical fixes.

Please include your estimated turnaround time and mention any similar debugging work you've done.