So I got a discount Orion H Beta filter from an online retailer that has warehouse deals. It was listed as "very good" with no other description of it's condition. It turns out it has a couple of pinholes in the coating (no big deal) but it also has a small chip of coating missing (about 9 o'clock in the photo, enlarged on the right). It also looks like someone had sent it in for testing because it came with a test sheet (on left) printed last summer in addition to the little paper from Orion.
Is the flaking coating a problem?
Does everything look ok on the test chart? It is skewed a bit to the right but I don't know how much it matters.
Any opinions if I should keep it or not? I have 29 days to return it if I want to.