got tricked by @objktcom interface... Wanted to change the amount listed and so I typed 3 on the textbox, assuming its the amount of eds and not the price. Sold 2 pcs at 3 xtz as the result. Price has been fixed and I sincerely apologize if this felt unfair to those who got at full price. 🙇‍♂️🙇‍♂️

As a feedback, I would suggest @objktcom 
 to maybe add the text "xtz" or tez logo as placeholder text to clearly suggest that it is a price rather than random "20" which is ambiguous.