Książka The Algorithm Design Manual

Depending on the quantity indicated, Optiba offers various purchasing options, taking into account the availability of parts and other factors. If the demand exceeds the available stock, it is offered to submit an inquiry or purchase a smaller quantity, which is in our warehouse.

Option redirects to

From where you can complete the order

Option redirects to

From where you can send us an inquiry for selected items. You will be informed about the offer by e-mail, and then you will be able to place an order by finalizing it in the order basket.

For more details check FAQ