Observed Signal · Jul 5, 2026 · Technical Release · Source: DEV Community · Impact: 1/5 · Sentiment: Neutral
Bot Finds Underpriced Game Consoles Using eBay Sold Prices
A developer published a tutorial and an Apify Actor that scans live listings on marketplaces (Vinted, Wallapop, Milanuncios) and values items using confirmed eBay sold prices. The tool (Second-hand Deal Scanner) applies filters to exclude accessories and junk, models buyer-protection/shipping/resale fees, and returns only listings with estimated real profit. It supports Spain, France, Germany, Italy and the UK, offers cross-border valuation (scan in one market, value against another eBay), and can be scheduled as a daily watchlist. Each scan costs $0.04. The Actor can be called by AI agents via an MCP-style server integration, and the author notes limitations around item condition, Spain-only availability for some marketplaces, and the inherent uncertainty of automated estimates.
Practical developer/tutorial release for marketplace arbitrage; useful for resellers and commerce tooling but not broadly industry-shifting for AdTech/MarTech.
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Key Takeaways & Evidence Grounding
- The author built an Apify Actor called 'second-hand-deal-scanner-es' to scan Vinted, Wallapop and Milanuncios and value items against confirmed eBay sold prices.
- Valuations use only confirmed eBay sold listings (not active/asking prices) and include median price, sample size and confidence (example: 184 sales, median €217.47).
- The scanner applies aggressive filters (title mismatch, accessory, junk, suspiciously cheap) and models buyer protection, shipping and resale fees in its economics.
- Each Actor scan costs $0.04; a 10-item daily watchlist was estimated at roughly $12/month.
- The Actor supports cross-border valuation (e.g., scan French listings but use ebay.de comps) and integrates with AI agents via an MCP-style endpoint.
Connected Companies & Entities
4 Entities mapped“I automated the whole loop: scan live listings on Vinted, Wallapop and Milanuncios, value each item against confirmed eBay sold prices (not ...”
“I automated the whole loop: scan live listings on Vinted, Wallapop and Milanuncios, value each item against confirmed eBay sold prices (not ...”
“Schedule it in the Apify Console (Actor → Schedule → daily 8:00), wire the webhook to Telegram or Slack, and you'll wake up to a ranked list...”
“Schedule it in the Apify Console (Actor → Schedule → daily 8:00), wire the webhook to Telegram or Slack, and you'll wake up to a ranked list...”
Ontology Mapping & Concepts
Related Market Signals & Shifts
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