When you lose the Buy Box you see two numbers: your price and the other seller’s. What you do not see is your floor: the price below which this item earns you nothing.
What your floor is made of
Purchase price, the commission for your category, the fixed fee per item where there is one, shipping and packaging. Commission runs between 7% and 16% depending on the category, and between 4% and 12% on Kaufland.pl; the rates are on our page about Kaufland fees. If you only set the purchase price against the selling price, you count a profit that is not there.
On a €28.99 item in a 13% category, nearly four euros of commission is gone before purchase and shipping are counted at all. Two euros off is a lot if €1.40 is what remains.
When to lower your price
If the price you need is comfortably above your floor, lower it. If it is below your floor, let the Buy Box go, because every sale would be at a loss. If it is just above, look at the whole item and ask whether it is still worth stocking at 80 cents each.
Sellgrip works through these cases per item and puts the floor on the same line as the suggestion, under Buy Box. Price guard alerts you when a price slips below it.

