Observed public store
BuySold Ltd / webshop2door
At the dated observation, the public eBay store displayed approximately 612K items sold, 10K followers and roughly 852 active store items.
Marketplace Intelligence ? demonstration
What the ?49 baseline looks like before any change is claimed.
A dated public-data example showing the evidence structure, materiality rules and exception discipline used for one defined marketplace watchlist.
Demonstration only. Observed 4 September 2026 (UK). This is a BASELINE, not a customer result and not evidence that a marketplace change happened. PERSIK has no stated customer relationship with the seller shown below. A movement would only be reported after a second time-separated observation of the same confidently matched listing.
Pilot rule
Baseline + one agreed recheck
Every claimed movement must retain before/after values, timestamps, source URLs and the buyer-agreed materiality rule. Ambiguous or inaccessible listings stay exceptions instead of being forced into a comparison.
Baseline watchlist extract
Six public observations from the sample
| Listing observed | Baseline price | Other public signal | Recheck rule |
|---|---|---|---|
| 5 Pack 3g SUPER GLUE | ?2.65 | Fixed displayed price | Flag ?5% or ?0.50 movement |
| 4x Exfoliating Body Scrub Gloves | ?2.79 | Fixed displayed price | Flag ?5% or ?0.50 movement |
| 4 Piece Bingo Dabber Pens | ?2.85 | Multi-buy promotion shown | Flag price or promotion change |
| 3 Pack Retro Gold Crown Bottle Openers | ?2.59 | Fixed displayed price | Flag ?5% or ?0.50 movement |
| Epoxy Resin Glue Extra Strong Adhesive | ?2.84 | Multi-buy promotion shown | Flag price or promotion change |
| 4 Reusable Toaster Bags | ?3.99 | 1,592 sold shown on observed listing | Flag price, availability or promotion change |
Prices and public signals above are preserved as the dated observation, not presented as current prices.
Second scan output
What a recheck would add
- recheck timestamp and exact matched listing
- current price/range, promotion, availability and title state
- calculated before/after delta
- HIGH / MEDIUM / LOW / NO MATERIAL CHANGE classification
- source URL plus one short buyer-action note
Exception discipline
What we refuse to fake
- No movement from a single observation.
- No forced match when title/variant/seller identity is ambiguous.
- No claim of complete market coverage from a defined watchlist.
- No login, CAPTCHA, access-control or anti-abuse bypass.
- No automatic repricing or trading inside this pilot.
Smallest useful test
?49 pilot: up to 20 public listings on one marketplace.
Choose one category, seller or competitor set and define what counts as material. PERSIK captures the baseline, performs one agreed recheck and returns a source-linked movement report plus exception log.