Bol Data Scraping Services

Delivery promise decides the page, so it belongs on every offer

Bol weights delivery speed heavily in which offer is presented by default. An offer priced above another can hold the page because it can deliver tomorrow.

• A dataset capturing only the cheapest offer reports a price that is not the one most shoppers are shown.
• A dataset capturing only the default offer misses that a cheaper option exists a click away.
• A dataset without delivery promise per offer cannot explain why the default offer is not the cheapest, which is the question a client actually has.

We capture the full offer list with price and delivery promise on each row, plus is_default_offer. That combination is what makes it possible to see whether a competitor is winning the page on price or on logistics — and those call for entirely different responses.

Netherlands and Belgium are two markets on one brand

Bol serves both countries, and price, assortment, delivery promise and VAT treatment can all differ between them.

storefront is mandatory on every record. Blending the two produces a dataset that is wrong for both and that shifts whenever the mix of observed pages changes.

For clients selling into Benelux this split is usually the point rather than a technicality: the same product can be competitively priced in one country and not in the other, and a blended figure hides exactly that.

Bol competes with its own partner sellers, on the same page

Bol sells its own stock and hosts partner sellers on the same product pages. The two are commercially different in a way a single price column cannot express.

Bol's own price is the retailer's decision and what a supplier negotiates against. A partner's price is an independent third party, and for a brand it is a channel-integrity question.

We capture seller_type and the seller name on every offer. For brand clients, the most common finding is a partner seller holding the default position on their own product at a price that undercuts the agreed one — visible only when every offer is captured rather than one per product.

Which offer holds the page is a series worth keeping

Default-offer ownership changes, and the changes are informative. A seller who takes the page after a small price move, or who holds it despite being more expensive, is telling you how the selection is weighted.

Because is_default_offer is on every offer row at every capture, buy-box ownership becomes a time series rather than a snapshot. Tracked across a category it shows which sellers are structurally advantaged on delivery and which are simply buying position on price.

That series cannot be reconstructed later from a dataset that stored one price per product, which is why the offer-list structure has to be chosen at the start.