Meade 1.25" broadband nebula filter (pre-4000 series) was rated the best broadband filter in an S&T review. I found this filter superior to both the Celestron light pollution reduction filter and the 4000 series broadband in side-by-sdie tests, with great general performance on diffuse and planetary nebulae. The cell has a small nick on an outside edge where a bit of the black anodizing has chipped off, but the filter glass and coatings are perfect.
$45 shipped. PayPal accepted.