COLLECTION

Collector (you)
  ├─ Break        a box/pack/case you opened
  │    ├─ product → Set
  │    ├─ total_cost $150.00     break_date 2025-06-15
  │
  └─ CardCopy     one physical card
       ├─ card    → Card (catalog)      break → Break (NULL if bought)
       ├─ acquisition_type purchase     acquired_price $40.00
       ├─ serial_number 54 (of /100)    self_grade NM-MT
       ├─ grading_company PSA · grade 10 · cert #…
       ├─ status  in_collection | for_trade | for_sale | sold
       │
       └─ CardCopyCost  grading · shipping · … (amount + vendor)

COPIES POINT STRAIGHT AT THE CATALOG

One CardCopy row per physical card. A parallel is just a Card with a finish, so a parallel copy references it directly — no extra lookup, no parallel-specific tables.

WHERE A COPY CAME FROM

Every copy records how you got it: acquisition_type is purchase, pack_pull, trade, gift, or other, alongside acquired_price, acquired_date, and acquired_source. Buy a single card and that's the whole story.

Pull it from a Break instead — a box, pack, or case you opened — and its cost comes from the break, not you. The break carries one total_cost; every card you pull points back via break_uuid, and its acquisition cost is derived live: total_cost / cards pulled. Catalog more pulls and every card's share drops — no manual recalculation.

TWO GRADES, ONE COPY

A copy can carry both a self_grade (your call — a named rung like NM-MT on the shared 1–10 ladder) and a professional grade (company + grade + cert). The API returns grade_delta — pro grade minus your guess, on the same 1–10 ladder.

A COPY HAS A LIFECYCLE

status tracks where a copy sits: it starts in_collection, flips to for_trade or for_sale when you're moving it, and lands on sold once it's gone. Marking a copy sold records sale_price and sold_date, turning paper value into realized gain/loss on the Financials page.