‹ A private collection, appraised like a portfolio ›
MILLENNIUM
A Yu-Gi-Oh collection, appraised like an investment portfolio.
Per-lot cost basis. Daily card pricing. Coverage-aware valuation. Built, deployed, and operated by one engineer.
Catalog
Synced nightly
02:00 UTC
14,388 cards · 43,313 printings · 51,481 snapshots · as of Jun 2026
Blue-Eyes White Dragon
Legend of Blue Eyes · 1st Edition
- Market
- $312.40 ▲ +4.2%
- Cost basis
- $180.00
- Unrealized
- +$132.40
- 90-day
- 90-day trend: rising, $168 to $312.
- Coverage
- ✓ complete · EXACT match
The rarest card, rendered as a financial instrument — the only foil on the page. Move your cursor across it.
01 — The Curve
A portfolio’s worth, day by day.
Append-only daily value snapshots. On a day where pricing covers only part of the collection, the point is marked amber and noted partial — a coverage gap never masquerades as a value drop.
| Date | Value | Coverage |
|---|---|---|
| 2026-03-20 | $3,812.00 | Complete |
| 2026-03-27 | $3,905.00 | Complete |
| 2026-04-03 | $3,878.00 | Complete |
| 2026-04-10 | $4,021.00 | Complete |
| 2026-04-17 | $4,096.00 | Complete |
| 2026-04-24 | $4,188.00 | Complete |
| 2026-05-01 | $4,142.00 | Complete |
| 2026-05-08 | $4,290.00 | Complete |
| 2026-05-15 | $4,376.00 | Complete |
| 2026-05-22 | $4,051.00 | Partial |
| 2026-05-29 | $4,512.00 | Complete |
| 2026-06-05 | $4,604.00 | Complete |
| 2026-06-12 | $4,783.00 | Complete |
| 2026-06-15 | $4,912.00 | Complete |
02 — The Watch
What moved.
Owned (printing, edition) pairs ranked by price change over a window. A pair missing a usable price at either anchor is excluded — a gap is never a fake +100%.
| Card | Ed. | Price | Δ% | Δ$ |
|---|---|---|---|---|
| Blue-Eyes White Dragon | 1st Ed | $312.40 | ▲ +4.2% | ▲ +$12.60 |
| Ash Blossom & Joyous Spring | Unlimited | $41.10 | ▲ +9.1% | ▲ +$3.43 |
| Pot of Greed | Limited | $14.25 | ▲ +2.4% | ▲ +$0.33 |
| Dark Magician | 1st Ed | $88.00 | ▼ −1.8% | ▼ −$1.61 |
| Maxx ‘C’ | Unlimited | $6.40 | ▼ −3.0% | ▼ −$0.20 |
| Mystical Space Typhoon | Unlimited | $0.80 | — | — $0.40 |
Sub-$1.00 base → percent withheld, dollar move still shown. No fake volatility off a five-cent card.
Alerts
Set a watch on any card — a percent move over a window, in a direction, fires once a day.
- Ash Blossom
- ▲ +9.1% · 30d
- Blue-Eyes White Dragon
- ▲ +4.2% · 7d
Evaluated nightly at 05:00 UTC, after pricing and valuation. Append-only event feed.
03 — The Engine Room
Built like the vault it frames.
No fantasy pricing. A reconciled, traceable appraisal pipeline, self-hosted and operated end to end.
- Backend
- Django 5.2 · DRF · drf-spectacular · Postgres 16 (modular monolith, 7 apps)
- Frontend
- Next 16 App Router · React 19 · TypeScript · Tailwind v4
- API contract
- OpenAPI → generated typed TS client, CI drift-gated (two orthogonal halves)
- Pipeline
- Dragon Shield import · confidence-scored matching · human review · append-only snapshots
- Hosting
- self-hosted Hetzner VPS · Caddy auto-TLS edge · gunicorn + Next-standalone
- Scheduling
- daily syncs as systemd timers (Persistent catch-up after downtime)
- Backups
- nightly pg_dump → Cloudflare R2 · restore-tested
- Quality
- main gated by six required CI checks · reviewed in-house + independent second pass
- Accessibility
- sr-only data tables mirror every chart · aria-sort · reduced-motion throughout
Designed, built, deployed, and operated by Erick Ti.
Source · github.com/erick-ti/millennium