PRICE DROP on Autel X-Star Filters
Don't know if their web site has been updated to reflect the price drop but it looks like they are trying to dump some inventory.
Give them a call or email for pricing.
They make a difference depending on what you're filming. If you film from high up with nothing in the foreground, you won't need them much, if you fly lower where you will have objects in the foreground and some in the distance they can be invaluable. I suggest you look up YT video about when they are needed. Many don't understand when to use them or how to use them. They are not just sunglasses for your quad.
The cost is probably due to the coatings... they come as polarized and none-polarized and also single coat or multiple coatings. More coatings is better and more costly.
PolarPro has a great app for which & when to use them.