Hi Abhijit,

You can visit my blog, where I have explained how to create a custom filter

https://medium.com/@rishabh.shandilya/create-your-own-way-of-filter-by-npe-non-persistant-entity-and-microflow-4ffd11e52fb0

(after going through the blog)

Now, in your case, you can use a price range slider in place of text box,

and customize your XPath accordingly.

Let me know if you have any issues,

Hope it helps!!