Cross-Marketplace Price Arbitrage Scraper
Overview
A price-arbitrage pipeline across Amazon, eBay and several other retail sites. Scrapers pull the same products from each marketplace — titles, descriptions, product IDs, prices, condition and images — and the prices are then compared against each other rather than viewed one site at a time.
That cross-comparison is the point: where the same item sells materially cheaper on one marketplace than another, there is a buy-low, sell-high opportunity, and the report surfaces exactly those gaps so the client can act on them for profit. Runs land every four hours, so a gap is caught while it is still open.
Outcome
Turned six price checks a day across several marketplaces into a standing list of profitable buy-low / sell-high gaps, replacing manual price tracking entirely.
Architecture & Pipeline
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01
Scheduler (4 h)
Recurring runs
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02
Amazon · eBay · Other Sites
Source marketplaces
- Amazon
- Ebay
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03
Selenium Scrape
Titles · IDs · prices · condition · images
- Selenium
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04
Rotating Proxies
Bot-detection handling
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05
Cross-Site Comparison
Same product, every marketplace
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06
Arbitrage Opportunities
Buy low here, sell higher there
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07
JSON / CSV / Excel
Structured report
- CSV
- Excel
- JSON
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08
Email / Drive Delivery
Report out
End-to-end flow, in order. Scroll sideways on a narrow screen.
Key Features
- Same products tracked across Amazon, eBay and several other retail sites
- Prices compared marketplace against marketplace to surface buy-low / sell-high gaps
- Arbitrage opportunities reported as the actionable output, not just raw prices
- Multi-field extraction: titles, descriptions, product IDs, prices, condition
- Image extraction with PNG/JPG export
- Scheduled execution every four hours with full logging
- Structured JSON, CSV and Excel output for downstream analytics
- Web UI for adding and removing product IDs and triggering runs
- Rotating proxies and request throttling to handle bot detection
- Automatic delivery via Google Drive and email
- Deployed on an Ubuntu server for reliability