This is due to the buyer fee that is set on your items. Check to see what the buyer fee is for your item ( open any item of yours, click the edit button, click update description, and see where it says “Set your Price” ) and increase the amount your item costs now with the buyer fee.
For example. Your Price + Buyer Fee = Total Price. 1$ + 3$ = 4$ (4$ being the price shown)
My numbers are just examples. Check your item edit page to see exactly.