Hi,
Just hiding the prices for the public on the product page is easy with a small view override of product / listing.php via Display>Views.
With a bit of PHP, you would load the user groups of the current user and based on the user groups, you would skip the foreach which displays the prices or not.
joomla.stackexchange.com/questions/18357...evel-user-belongs-to
www.hikashop.com/support/documentation/1...ize-the-display.html
If you know PHP and with what is in these two links, you should be able to achieve it.
However, the devil is in the details... This won't mean that it will change anything for the price of the product in the cart, checkout, order for these users. But you're not talking about that in your messages. But maybe you don't want to sell to these users either, only to wholesale users ? In that case, this change could be fine on its own.
Otherwise, I'm afraid that the prices will have to be changed in the products. And in that case, the fastest could be to do MySQL query in your database via phpmyadmin.
For example:
DELETE FROM #__hikashop_price where price_access LIKE '%,XX,%'
where #__ is the prefix of your tables and XX the id of a user group. This query will delete all the prices assigned to that user group (even if they are assigned to other user groups).