Hello @hossein
Greetings of the day..!!
To create a custom filter Bagisto >> packages >> Webkul >> Shop >> src >> Resources >> views >> categories >> filters.blade.php this file is responsible and hence you can create a new component for the filter and after that set the price according to your requirement in the URL because AJAX request will get call here. as shown below.
filter.png
Hopefully, this will help to resolve your query.
Thanks & Regards..!!