I'm looking for any 1.25" narrowband filter that's in very good to excellent condition. Email me with the information and asking price, including shipping to Toronto, Canada. Postal code is M1W 2C3 if you need it for a shipping estimate. Willing to spend up to $80 depending on brand and condition. I have a 7mm Vixen Lanthanum eyepiece in great condition that I can trade for a narrowband filter plus cash.