I have one each of the Orion SkyGlow and SkyGlow UltraBlock filters in the 1.25" format. These are nice filters for teasing out subtle detail of faint objects under light polluted skies.
These were purchased from Orion, and were used a couple of times. Soon after, I moved to all 2" format eyepieces for wide field observing. Both are optically and cosmetically mint.
Orion SkyGlow $40.00 shipped
Orion SkyGlow UltraBlock $70.00 shipped
Both for $105.00 shipped
Clear (and dark) Skies!