Dayton, Ohio · Navy veteran-owned
Graded cards.
Provable grades.
Every card on our shelf carries a TAG grade you can verify yourself — cert number, 1,000-point score, and the full DIG report, one click away.
✓ Navy veteran-owned · Dayton, Ohio
✓ Every grade verifiable online
✓ Free insured shipping
✓ Ships in 1 business day
The shelf
On the shelf now
Why TAG?
Technical Authentication & Grading
Grading by measurement, not opinion
01
Tech-Driven Precision
Photometric stereoscopic imaging photographs the card under light from multiple angles to build a surface map — catching print lines, scratches and dings the naked eye misses.
02
1,000-Point TAG Score
Every card gets the industry-standard 1–10 grade plus a precise 1,000-point score — so you know whether a 10 is a high 10 or a low 10.
03
Scan the Slab, See the Data
The QR code opens the card's Digital Imaging & Grading (DIG) report: hi-res images of every identified defect, category scores, centering metrics and population.
04
Know Exactly Why
No black box. Corners, edges, centering, surface and dimensions are each scored individually, and every deduction is pinpointed on the card — you see exactly what cost the grade points.
05
Premium Crystal Slabs
Crystal-clear, UV- and abrasion-resistant acrylic with the grade laser-inscribed inside the case — a clean, label-free look that shows the whole card.
06
Ranked & Tracked
Public population reports, leaderboards and chronology let any buyer verify where this exact card stands against every other TAG-graded copy.
Our story
One Navy veteran, one basement in Dayton
C3-DO is a part-time shop run by a Navy veteran out of our basement in Dayton, Ohio — with my kids learning the business along the way. We started on eBay and still run things the same way: honest photos, direct communication, and no empty promises. Verify our selling history on eBay under c3dohub.
Meet the shop →420 × 260
