CardSniper

Real-Time eBay Deal Detection for Sports Cards

Dominate your eBay searches with CardSniper — the no-login Chrome extension that instantly tells you if a card listing is a deal or a dud.

Whether you're flipping, collecting, or just trying not to overpay, CardSniper gives you a live read on:

• ✅ Median comp values
• ✅ Instant profit/loss math
• ✅ Deal ratings (Good Deal, Overpriced, etc.)
• ✅ Confidence scores based on comp depth
• ✅ One-click access to sold listings

All of this happens right on the eBay search page — no clicking around, no third-party sites, no guesswork.

❤️ 10% Donated to Animal Rescue

We donate 10% of all voluntary payments to Best Friends Animal Society, a national leader in no-kill shelter advocacy.

Cards are fun. Helping animals is better.

💸 Completely Free — Pay What You Want

CardSniper is now 100% free.
Just enter $0 at checkout to download instantly.

Want to support development? Enter any amount you like — no pressure.
10% of whatever you pay goes to saving shelter animals.

💡 How It Works

CardSniper runs locally in your browser as a lightweight Chrome extension.
Just search eBay like usual — CardSniper overlays:

• Real-time comp data
• Profit indicators
• Deal highlights

— all without leaving the page.

🛠️ More Features Coming Soon

We’re just getting started — and all updates are free.

• 🔄 Auto-refreshing comp data
• 📈 Flip tracker & ROI logs
• 🧠 Smarter comp filtering
• 🔥 Heat scores by card type and player trends
• 🧮 Best Offer Reveal (Beta) — we're working on a backend API to show the actual sold price when a listing used Best Offer (not just the crossed-out list price)

These features will help you spot better deals, faster — and stay ahead of casual buyers.

🌐 Chrome-Only (For Now)

Currently available for Chrome.
Support for Brave, Edge, and Firefox coming soon.

🔒 No Login. No Tracking. No Creep.

• No account required
• No email collected
• No tracking or analytics

100% local. 100% trust-based.

⚠️ Real Data, Real Context

CardSniper is powerful — but not perfect.
Comps can vary. Outliers exist. Context still matters.

Use CardSniper as your second brain — not your final say.

📦 What You Get

• ✅ CardSniper v2.0 (.zip Chrome extension)
• ✅ Step-by-step install guide
• ✅ Free lifetime updates

⚠️ Disclaimer

CardSniper depends on eBay’s page layout. If eBay changes things, features may temporarily break.
I’ll do my best to fix bugs quickly, but ongoing support is not guaranteed.
If functionality is lost completely, case-by-case refunds will be considered for those who paid.