On the WebApp
1- Click on your property, then the "Offers" tab.
2- Click on the "Refuse" button of your pending offer, then "Refuse with a counter offer".
3- Enter the counter-offer or edit, if necessary, your different fees and charges in order to find the right balance between the different parties.
4- Click on "Add offer" to validate your counter offer.
On iPhone
And that's it! All you have to do is wait for your buyer's answer 😎