What can I record about a piece?

Quite a lot — a piece is your personal record, so you can track as much or as little as you like. The shared specs come from the catalog; everything below is yours.

Condition & physical state

• Grades for the model, the box, and how it runs — see How does condition grading work?
• Whether you have the box and the shipper, and their conditions — What's the difference between box condition and shipper condition?
• Weathered or custom-modified flags — What do "weathered" and "custom modifications" mean?

Where it is and how it's doing

• Status (Delivered, For Sale, On Loan, and more) — What do the piece statuses mean?
• Storage location so you can find it later.
• For locomotives, an odometer / chronometer reading — Odometer and chronometer: what are those?

Money & history

• Financials: what you paid, who you bought it from, replacement value, and sale/loan details. These are always private to you.
• Personal notes and up to three custom fields for anything we didn't think of.

Media

• Photos and documents (receipts, manuals) — see How many photos can I add to a piece? and Can I add receipts or manuals to a piece?

You don't have to fill any of it in — add what's useful to you and skip the rest.