buildA useful price record identifies the exact component, its seller and market, the purchase unit and when the source was observed. An advertised amount alone does not establish stock, shipping, tax, membership eligibility or the final checkout total.
Check the product behind the number.
A product page can contain recommended accessories, crossed-out prices, a selected variant and structured metadata with different amounts. Our reviewed observations use the main visible product price only when the manufacturer and complete part number agree. Redirected or mismatched products do not receive a borrowed quote.
When visible price and page markup disagree, we retain the discrepancy in the source evidence. Stock conflicts stay unknown. A cached response also retains its age; importing an observation does not renew the original date.
Recent is a defined policy.
In this preview, current US quote selection requires an exact reviewed package, known in-stock status, USD/US scope and a source observation within 24 hours, with acceptable cache freshness. A dated observation can remain useful evidence after it stops qualifying as a current quote.
A newer failed check can suppress an older claim for the same listing. Other retailers remain independent. Two offers from one retailer do not establish two-store coverage, and a low foreign-market amount is excluded from USD selection.
Use the source date when deciding.
Component detail pages retain the original observations and links. The builder recalculates quote eligibility when a saved plan is loaded. If a chosen quote expires, it stays unavailable instead of silently becoming a different retailer’s price. You can add a separately labeled personal quote, but it remains your scenario input rather than a store-verified observation.
This article describes the implemented BuildAPC research-preview calculation and sourcing policies. See the methodology for their limits.