@MB THEME and all member of the house this is fast solution for the above topic. no need of translation

at : /oc-includes/osclass/helpers/hItems.php
just find this code :
Code: [Select]

    function osc_format_price($price) {
        if ($price == null) return osc_apply_filter ('item_price_null', __('Check with seller') ) ;
        if ($price == 0) return osc_apply_filter ('item_price_zero', __('Free') ) ;

Any solution you think people may need pls always share.

Best way is to change this string via translation.

It is a very good new knowledge.