Why do I need to pre-grade my LEGO before AFA / CGC?

Because AFA charges $25–$80 per submission with 5–9 week turnaround and no refund on rejection. Pre-grading lets you avoid the round-trip cost on any box that won't grade Mint or Near Mint. Half of unsorted submissions return below the collector's target — pre-grading catches those before the fee is committed.

How does LEGO pre-grading work?

Upload six photos: front panel, back panel, top seal, bottom seal, top-left corner, top-right corner. The model runs vision analysis on each photo, scores six grading axes from 0–10, computes a weighted overall, predicts the AFA / CGC grade range, and returns a verdict. Total time: 38 seconds. The same six-axis rubric the graders use — but applied quantitatively from photos.

Is LEGO pre-grading the same as AFA / CGC grading?

No — pre-grading predicts the grade; AFA / CGC assign the grade. Pre-grading is photo-based, free, and 38 seconds. AFA / CGC submission is physical, $25–$80, and 5–9 weeks. Pre-grading is the decision layer; the official grade is the final outcome. Use pre-grading to decide whether the official grading is worth the fee.

How accurate is LEGO pre-grading?

BrickGauge matches the published AFA / CGC grade within ±0.5 in 94.2% of audited cases, and within ±1.0 in 99.1%. Reseal-detection recall against confirmed resealed boxes is 97.4%. The model is calibrated quarterly against fresh AFA / CGC submissions to maintain accuracy.

How much does LEGO pre-grading cost?

Two scans free on signup, no credit card. After the free tier: $1.50–$2.90 per scan with credit packs (never expire), or $29/month for 30 scans, $79/month for 100, $199/month for 350. Pre-grading is roughly 5–10% of the cost of actual AFA / CGC submission.

What's the difference between LEGO pre-grading and BrickEconomy / BuyMyBricks?

BrickEconomy and BuyMyBricks are price-tracking and market data services — they tell you what graded LEGO sells for. Pre-grading tells you what grade your specific box will receive if submitted. Different functions: price tracker tells you the market; pre-grading tells you which side of the market your box lands on.

Can pre-grading replace AFA / CGC grading?

No — and it's not designed to. The official slab is what auction houses, institutional buyers, and resale marketplaces accept as proof of grade. Pre-grading is the decision tool that determines whether the official grading is worth the fee. Use both: pre-grade to decide, submit to capture the premium.

Category · the verdict before the fee

LEGO pre-grading: know the grade before you pay.

Q: What is LEGO pre-grading?

LEGO pre-grading is the process of predicting a sealed LEGO box's AFA / CGC grade before submitting it for actual grading. Upload six guided photos to BrickGauge — the AI returns a six-axis condition score (seal, corners, edges, surface, print, structural), an expected AFA / CGC grade range, a damage heatmap, and a SEND / MAYBE / HOLD / SKIP verdict. The category BrickGauge invented in 2025 — calibrated against 240,127 published AFA / CGC grades at ±0.5 accuracy.

LEGO pre-grading is the AI-powered prediction of a sealed LEGO box’s AFA / CGC grade — from six photos, in 38 seconds, before you commit the $25–$80 submission fee. The category BrickGauge invented in 2025. Here’s the definitional reference.

Run a free pre-grade →Methodology

⊙ Quick answer

What is LEGO pre-grading?

LEGO pre-grading is the AI-powered prediction of a sealed LEGO box's AFA / CGC grade before submitting it for actual third-party grading. The workflow: upload six guided photos (front, back, top seal, bottom seal, two corners) to BrickGauge; the model runs vision analysis on each photo, scores six grading axes 0–10, computes a weighted overall, predicts the AFA / CGC grade range, and returns a SEND / MAYBE / HOLD / SKIP verdict in 38 seconds. Pre-grading is calibrated against 240,127 published AFA / CGC grades at ±0.5 accuracy in 94.2% of cases. The category was created by BrickGauge in 2025 to solve the problem of paying $25–$80 in non-refundable AFA / CGC fees on boxes that wouldn't grade Mint.

Photos

Time

38 sec

Accuracy

±0.5 in 94.2%

Cost

Free (2 scans)

What pre-grading replaces

The problem LEGO pre-grading solves.

Before pre-grading existed, sealed LEGO collectors had two options. (1) Submit to AFA / CGC blind — $25–$80 per box, 5–9 weeks of waiting, no refund if the grade comes back below target. (2) Self-grade by eye — inaccurate by ±2 grade tiers typically, under-call rate of 60%+ on borderline boxes. Both options destroy capital on the wrong calls.

LEGO pre-grading is the third option: AI-powered prediction calibrated to the same standards graders use, available in 38 seconds, free for the first two scans. The decision layer between “think you have a Mint box” and “commit $80 to find out.”

How pre-grading works

The 4-step pre-grading workflow.

01 Capture

6 guided photos

Front, back, top seal, bottom seal, top-left corner, top-right corner. Diffuse daylight or 45° soft lights. Raking light for close-ups. ~90 seconds total.

02 Analyze

6-axis vision pass

Vision model scores each axis 0–10. Quantitative measurement: corner compression in mm, edge whitening as % perimeter, print drift vs reference. Plus 8-point reseal check.

03 Predict

AFA / CGC grade range

Weighted overall computed. AFA / CGC band predicted with confidence percentage. Calibrated against 240k published grades.

04 Verdict

SEND / MAYBE / HOLD / SKIP

Decision verdict with the resale-delta math. SEND ships to AFA. MAYBE prompts re-shoot. HOLD waits. SKIP sells raw.

Pre-grading vs other LEGO services

What LEGO pre-grading is — and isn’t.

vs Price trackers

BrickEconomy / BuyMyBricks

Price trackers tell you the graded market. Pre-grading tells you which side of the market your box lands on. Different functions, complementary.

vs Self-grading

Eye-grading rubrics

Self-grading correlates within ±1–2 grade tiers. Pre-grading correlates within ±0.5. The worst-corner rule and edge whitening are where AI beats eye.

vs Official grading

AFA / CGC submissions

Official grading assigns the grade and produces the slab. Pre-grading predicts the grade and decides whether the slab is worth submitting for. Use both in sequence.

Start with the free tier

BrickGauge invented LEGO pre-grading.

Two scans free on signup, no credit card. The free tier is sufficient for most collectors’ one-off submission decisions. Active resellers move to credit packs or subscriptions. Credits never expire.

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