Buy Box doesn’t have any direct link with the Sales price and you cannot ensure that if you have set a sales price you will get the Buy Box. Lowering the price will only enhance the chances to win Buy Box but is not guaranteed as a lot of other factors are also involved in the Buy Box race.
You can lose the Buy Box if your sale price expires and you no longer have a competitive offer. However, it is not always possible to predict whether you will win or lose the Buy Box because there are a lot of factors that could affect your chances of winning. The cost of the item, its availability, the seller’s past performance, and the delivery choices the seller provides are a few factors that may impact the Buy Box.