SecondFish: Automated Marketplace Flip & Deal Analyzer

About

SecondFish is Built by Flippers, for Flippers.

AI-powered deal and flip analyzer for Facebook Marketplace. Automatically evaluate listings, get real-time market web pricing (scans the internet!), and make smarter buying & flipping decisions.

Update 01/05/26: Enhanced web search powered by Exa.ai with configurable result depth (default: 2 sources), Performance optimizations.

🚀 HOW IT WORKS

1. Connect OpenRouter (free account, add credits)
2. Browse Facebook Marketplace as normal
3. Click any listing → AI analyzes it automatically
4. View all evaluations in your dashboard

💰 PRICING

The extension is FREE!!. You pay OpenRouter directly for AI usage, this is by far the cheapest and most flexible option.

Each listing analysis makes 3 AI calls:
1. Product Extraction (~$0.001) - Identifies the product
2. Web Search (~$0.008-0.03) - Fetches live web market prices (most expensive)
3. Deal Evaluation (~$0.002) - Scores the deal

Typical cost: $0.005-0.04 per listing. $5 in credits = 125 - 1000 evaluations/items.

You have full control on choosing what model[free to any price point] and how many web searches to make!!

No subscriptions. No markups, We built this for ourselves, We have zero servers = zero costs = nothing to charge you for. You only pay OpenRouter directly for your AI usage!!!

🔒 100% PRIVATE - NO DATA COLLECTION

Your privacy is our priority. SecondFish has NO backend servers — everything runs directly in your browser. Your API keys, evaluations, and browsing data never leave your device. Zero tracking. Zero data collection. Complete privacy.

📊 30+ DATA POINTS PER LISTING

Deal Analysis:
• Overall Score (0-100) & Recommendation (Strong Buy → Avoid)
• Confidence Level & Market Risk Assessment

Pricing Intelligence:
• New Condition Pricing (min/p25/median/p75/max)
• Current Condition Pricing (5-point distribution)
• Recommended Buy Price (low/mid/high)

Demand Metrics:
• Velocity (fast/moderate/slow)
• Seasonality (peak/neutral/low)
• Days to Sell Estimate (5-point distribution)

Trust & Risk:
• Seller Trust Score (0-100)
• Scam Risk Level
• Market Volatility Risk

Product Identification:
• Brand, Model, Variant Detection
• Category & Subcategory
• Lifecycle Stage (current/discontinued/vintage)
• Collectible Flag

❓ FAQ

Q: Why OpenRouter instead of built-in AI?
A: BYOK (Bring Your Own Key) means no subscriptions, no middleman markup, and you choose your preferred AI model. Your API key, your control, pure freedom.

Q: What data do you collect?
A: None. All evaluations are stored locally on your device. We never see your data.

Q: Why 3 AI calls per listing?
A: (1) Clean extraction ensures accurate product identification. (2) Live web search gets real market prices. (3) Final evaluation combines everything into actionable scores.

Q: Can I use cheaper models?
A: Yes! Switch to DeepSeek or other budget models anytime. Quality may vary but costs drop significantly.

💬 SUPPORT

Need help? Have a feature request?
• Website: https://secondfish.com
• Email: [email protected]
• Join our growing community of successful flippers!

Visit secondfish.com for tutorials, tips, and more information.

📜 TERMS OF USE

All information, analysis, estimates, and recommendations provided by SecondFish are for informational purposes only.
- Does not constitute financial, investment, or professional advice
- Does not guarantee the accuracy, completeness, or reliability of any analysis
- Does not guarantee any specific outcome or profit from transactions
- Should not be relied upon as the sole basis for any purchasing decision

**Important**: Market conditions fluctuate, AI analysis may contain errors, and past pricing data does not guarantee future results. You are solely responsible for conducting your own due diligence and making independent purchasing decisions.
see more on terms in secondFish