★ SEALED PORTFOLIO MANAGER ★ LOCAL JSON ★ TCGPLAYER CAN'T HIDE YOUR HISTORY HERE ★ SINGLETON RULES ★

Sealed Portfolio

← back to the sandbox

⚠ Early testing version. This is Alex's personal sealed collectible ledger — singleton-only, TCG + figures + model kits, no plush. Updates irregularly (only when Alex adds to his own collection). UX is rough and will be polished over time. Feel free to look around; don't expect it to be a product.
Held — Cost: $0.00 | Market: $0.00 | Unrealized: $0.00
Closed — Cost: $0.00 | Net proceeds: $0.00 | Realized: $0.00
Lifetime P/L: $0.00

Holdings

Cat Game / IP Set Product Acq MSRP Buy $ Date Latest Spot Cost Basis Market Val Actions

Closed Positions

Cat Game / IP Product Acq Cost Sell Date Venue Sell $ Fees Net Realized Actions

Sold holdings live here. "Unsell" reverts a position back to Held if you logged it by mistake.

Portfolio Value Over Time

Cost basis (cyan dashed) vs logged market value (green). One dot per price check across all holdings. Use the + price button on a row to add points.

Add Holding

How you got it. Singleton enforced — qty 1 per SKU.
tracked separately. Cost basis stays $0.

Product missing from dropdown? Add it in the Manage Catalog section below.

Manage Catalog

Catalog lives in catalog.json shipped with the site. Your edits overlay in browser-local storage. Click Export catalog.json to download the merged file — commit it to the repo to make edits permanent for everyone.

lowercase, dash-separated, unique

Current Catalog

CatIDGameSetProductMSRPSourceActions

Backup / Restore

Portfolio lives in browser localStorage. Export often. Import replaces current data.

© 1999-2026 DiamondLegendz. Your data. Your JSON. Your rules.