Data sources and freshness

Retailer and marketplace APIs — official or licensed programmatic access. Most reliable, with structured price, condition and seller fields. Currently: Amazon, eBay, Walmart US, Walmart Canada, Newegg, Facebook Marketplace.

Public feeds — publicly published listing feeds. Currently: Craigslist (classifieds).

Public listing pages — read from the retailer's own public search pages. Slower and more fragile: layout changes can temporarily reduce or empty the results for that source. Currently: Kijiji (CA classifieds), Canada Computers, Micro Center, Swappa (used phones/laptops), Refurb.io (refurbished), Reebelo (refurbished).

Results are cached briefly per query, per source and per country so repeated searches stay fast and stay within provider rate limits. Each result card shows whether it was read live or served from cache, along with when it was last checked. You can force a fresh read at any time.

Watchlist items are re-checked on a schedule, which is what powers price-drop and target-price alerts and the price history sparkline.

Each source has a time budget. If a provider is slow, rate-limited, blocked or down, that source is skipped for that search rather than holding up the rest. An empty result from one source does not mean the retailer has no matching stock.

Processor, RAM, storage and screen size are extracted from listing titles and descriptions. Marketplace sellers write those inconsistently. When a specification cannot be read with confidence, Findeso shows a warning instead of asserting a value — and you should confirm on the retailer's page before buying.

If you operate a site listed here and want it removed, get in touch through the contact page and we will remove it.