How we compute market prices and savings
· author: Mykhailo Klimnyk, technical co-founder
Data sources
The source is public marketplace listings. We read 28 900 listings daily, store structured facts about each lot and publish aggregates with a link to the original. We never store seller contacts, never republish descriptions, and convert currencies at the official NBU rate.
Market price
For every position (model · storage · condition) the market price is the median of live listings over the last 14 days. Fewer than eight live listings — no price, and we say so. Problem lots (iCloud-locked etc.) form separate markets with their own prices.
The saving
Saving = market price minus listing price, frozen at detection time — never redrawn later. Implausibly large "discounts" are cut off by an upper bound.
Open history
Deal history is public with a delay of up to one day: live deals go to subscribers, yesterday's are open to everyone. The delay makes copying pointless.
Limitations
A market price is a segment benchmark, not an appraisal of a specific device. Risk filters reduce risk; the deal is always yours.