Pricing varies by supplier, but generally, it’s based on a rate per square kilometer of imagery covered (with some minimums and requirements for ordering). When looking at a search result, scene pricing is the price to purchase a whole image capture (the whole area shown in the thumbnail), this can be significant for large scenes.

If you have searched for a bounding box as an area of interest, and the area of interest meets the suppliers requirements within that scene, a second set of pricing is available to only purchase the part of the scene that is your AOI. In this case the AOI pricing will be to only purchase the part of the scene that overlaps with your AOI.