Market Memory

Marktplaats price is the opportunity asking price. Estimated value comes from external/manual evidence only.

Evidence Quality Snapshot

External/manual comps drive fair value. Marktplaats listings are opportunity signals only and stay out of the valuation baseline.

Marktplaats excluded from comps
Approved
0
Pending review
0
Rejected
0
Ignored
0
Duplicate signals
0
Pilot usable
0
Sample hidden
0
Review excluded
0
MP leaks
0
Practical rule: approved evidence gets normal weight, pending evidence is conservative, and rejected/ignored/sample rows do not inflate confidence.

Target Resale Market

Fair value is tied to the sell market you choose, not the country where the item was found.

nl_local_quick_sale

Category Alert Policy

This changes alerting, not valuation. Marktplaats remains the asking price only; external/manual comps still set value.

Alert gate

Product Entities

Retrieval and embeddings help find similar listings later, but they do not set the price. The valuation engine still relies on comp filtering and robust stats.

Add External Comp

Manual comps are the first real-data valuation lane. Enter sold results, auction outcomes, price guides, specialist-shop references, or your own confirmed outcomes.

Retro Gaming Evidence Import

Paste PriceCharting or manually verified eBay sold rows here. The adapter normalizes source prices into EUR evidence, then the valuation engine still does the comp weighting and outlier checks.

PriceCharting guide/soldeBay sold manualEUR-normalizedpending review after import
Why this exists: retro gaming has clearer product identities than broad collectibles, so it is the best first proof category. Once this source contract works, LEGO, Pokemon, and travel-scan valuation can use the same pattern with their own identity rules.

CSV External Sold Import

Preview real sold-price evidence before writing. Exact duplicates are reused, possible duplicates are marked for review, and Marktplaats baseline source types are rejected.

Evidence Review

Approved evidence uses normal weight. Pending evidence is reduced. Rejected and ignored evidence is excluded.

0 pending
No evidence rows for this filter.

Import Batches

Committed CSV imports are tracked as batches so imported evidence can be reviewed before it becomes fully trusted.

No import batches yet.
Pending imported observations
No pending imported observations selected.

Price Observations

Real/manual evidence rows only. Mock, sample, and smoke-test rows are hidden from pilot mode.

0 rows
No real external observations loaded yet.

Evidence Hygiene

Duplicate detection keeps repeated imported/manual comps from inflating confidence or pulling the weighted median.

Exact duplicates
0
Possible duplicates
0
Rows needing review
0
No duplicate evidence detected.