To hide the price of a work you just have to check the "No" box in the "Visible price" question next to the box where you have indicated the price of the work when you are on the work's page.
NB: this option is only available for works whose price is > 2500 EUR and for galleries with a Premium Subscription
On the site is indicated: Price upon request with a button Request the price
Collectors interested in your works can then ask you for the price of the work by clicking on this button. You will receive a notification in your account as well as an email informing you of the interest of the work.
By accepting, the customer will receive an email with the price of the work and it will be available in his basket if he wishes to buy it. The price will be visible only for him and will remain hidden for the other visitors of the site.
If you refuse to share the price of the artwork, the Artsper team will be informed and will question you about your refusal to meet the customer's request.