Know what every card is worth — instantly
DataNeverLies combines a live price guide, an AI card scanner, and portfolio analytics so you can buy, sell, and collect with confidence.
7-day free trial · Cancel anytime
9+
Categories tracked
167K
Cards in the guide
115K
Sales analyzed
16
Grade tiers priced
Market movers
Trending right now
Players and characters with the biggest 30-day price moves across the guide.
1. Ghost Reaper & Winter Cherries
Yu-Gi-Oh!
+103.7%
$236.00
2. F. Williams
Baseball
+71.5%
$358.50
3. Harry McIntire
Baseball
+54.6%
$3,127
4. Henry Severeid
Baseball
+52.1%
$58.51
5. Pat Deasley
Baseball
+52.0%
$200.49
6. Skeleton Scavengers
Magic: The Gathering
+50.7%
$5.11
7. George Wood
Baseball
+46.4%
$472.86
8. Mike Mattimore
Baseball
+46.2%
$2,772
AI ranked
Cards on the move
Top 30-day gainers across every category, ranked by our market engine.
2024 Quarter Century Bonanza Ghost Reaper & Winter Cherries RA03-EN014 Secret Rare
1909 Vintage Tobacco Series G. Browne #447
1887 Vintage Tobacco Series Jim Keenan #335
2024 25th Anniversary Rarity Collection II Exosisters Magnifica RA02-EN038 Ultimate Rare
1887 Vintage Tobacco Series Pat Deasley #143
1909 Vintage Tobacco Series F. Williams #2
2005 Flaming Eternity Phoenix Wing Wind Blast FET-EN053 Ultimate Rare
1911 Vintage Tobacco Series Larry Doyle #303
Why collectors switch
Everything you need to collect smarter
Live Price Guide
Current values for every grade — PSA, BGS, CGC, SGC, and raw — refreshed continuously from tracked sales.
AI Card Scanner
Snap a photo and our AI identifies the card, reads slabs and cert numbers, and estimates condition in seconds.
Buy / Sell Signals
Model-driven signals flag cards trading below trend to buy and overextended cards to sell — refreshed daily.
Portfolio Tracking
Add your cards, see live value, and track gains and losses like a real investment portfolio.
Membership
What the paid version gets you
Browsing the price guide is free. DataNeverLies membership unlocks the tools that make you money — every plan starts with a 7-day free trial.
Buy / Sell Signals
Daily model-driven picks: undervalued cards to buy, overextended cards to sell — with the reasons spelled out.
AI Scanner & Pre-Grade
Identify any card from a photo, read slabs and cert numbers, and get a condition estimate before you pay for grading.
Portfolio & Watchlist
Track your collection's live value, gains and losses, and get alerted the moment a card hits your target price.
Market Assistant
An AI analyst that reads the live guide and your portfolio — ask it anything from comps to what to sell first.
One membership, three ways to pay
- Monthly$14.99≈ $14.99/mo
- 3 Months$34.99≈ $11.66/mo
- AnnualBest value$99.99≈ $8.33/mo
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Signals, backtested
We test the signals so you don't have to
Every night the engine scores every liquid card and grade from 0–100 across eight market factors. Before we shipped it, we replayed it against 30 months of price history — using only the data that existed each week, no hindsight.
+5.0pp
Buy signals beat the market
Average excess return over the next 4 weeks vs. all tracked cards
−8.0pp
Sell flags dodge the drop
Flagged cards underperform the market by 8 points over 4 weeks
96%
Sell-side weekly hit rate
233 of 242 signal-weeks moved the way the model said (buys: 87%)
42,166
Signals stress-tested
102 weeks replayed point-in-time — no hindsight, no cherry-picking
📈What makes a BUY
- · Trading below its 90-day average (mean reversion)
- · Recovering from a deep pullback that has stopped falling
- · Uptrend on rising sales volume, while still near trend
- · Steady price sitting slightly under trend (accumulation)
📉What makes a SELL
- · Far above its 90-day average
- · Price still rising while sales volume fades (distribution)
- · Large 90-day run-up, stretched above trend
- · Sitting at its peak after a major gain
Each factor is weighted by its measured predictive power in the backtest, and only scores of 40+ are published. Results reflect a point-in-time backtest on the current (demo) data feed — informational only, not financial advice, and past performance doesn't guarantee future results.
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