A little competitive audit might shed some light on your question. I'll get you started.
Here's Amazon, Best Buy, and Target, left to right.
Best Buy is a little pedantic, with their "$25 - $49.99" and the other two are imprecise. Where do $25 items fall in Amazon? Where does Target list the $14.99 products?
They must have both decided that a little imprecision doesn't matter. It looks like Amazon lists $25 items in both filters where they fit, and Target lists $14.99 items in the "$0 - $14" range. And that's fine.
You ask what's most intuitive, but it looks like "intuitive enough" is good enough for these giant stores.
(Note that they all show the number of items within each filter, which helps users understand what they'll be getting before they click.)