I needed to add a price range filter to a Toolset View (number field: sale-price-toolset) and wanted simple ranges (e.g., $0–$2000, $2001–$4000), but couldn’t get any approach to work.
Solution:
Add a BETWEEN filter on the price field to produce FROM/TO inputs, hide those inputs, and use JavaScript to control them (e.g., a range slider) so the View receives min/max values; this approach worked after testing.