This is a kind of a controversial subject,
I used to think that members here were like family, I could trust them no problem, and still to this day I have that faith that we'll do each other right.
So this isn't about a purchase, it's about a sale, a sale that went very sideways for me.
Back about two years ago I started collecting filters, band filters, color, polarize, planetary,,,,,, 1.25" & 2"
after a few months of collecting I had over 30 filters, and I had tried most of them to compare and determine if the guru's of astronmy were correct in their preaching that you would have a very hard time as a beginner knowing any difference in between bargain & high end filters of the same type.
Nope, not much until you get to really dark skies and go through a lot of prep for the comparison's.
It's not like walking up to the fruit stand and seeing a bruised discolored apple or such.
So I picked out what I liked about the different filters then decided to sell off what I had acquired, some were new but most were used.
But I wanted to be clear about what I was selling so I contacted a fellow member that was known for his work with a spectro analysis results.
He agreed to do a batch of them for me, and gave me the link to those results, it was like having a fingerprint of each filter
I clearly stated their capabilites to the buyers and sold 90% of what I had collected in DSO filters, UHC's, O-III's, light pollution and so on, you name it I had it.
In all of those I had a Lumicon O-III, it was an older one but still had high spec's, like 94%.
It was a clean piece of glass, it had been well cared for.
During my acquisition period I ran across a Lumicon O-III that was basically the bruised apple, one look at it reflected it's price, I returned it, seller was good about it, a little reluctant but a decent guy, and I still do business with him no problem,,,
Anyway during my selling time, about a year later, I sold the Lumi O-III that I had purchased as a test piece, and kept, the price I selected reflected it's age, half of new, but it still had very good transmission, better than most that sell for new from other manufacturer's.
About a week went by after the sale and the buyer contacted me expressing displeasure in the filter, I said send it back and I'll refund your money.
I felt there might be a problem with him in that his first contact with me he was a raving nut case, all kinds of accusations, foul language & such,
He took his time about sending it back, and before I had received it he started to demand his money, it got worse each day until the filter finally got to me,
Well low and behold he had sent back the O-III that I had returned to another vendor several months before.
Not the same filter that I sold him, same type & manufacture but not the same one, I had the spectro results to prove it.
The rest of the story goes sort of like this, first he deleted all his correspondence with me in my message box that described his trying experimental cleaning solutions and techniques, then block me from communicating with him,
then he dragged the moderators into it, then he went to Paypal and declared I had hacked his account, and to do that he had to declare I never sold him anything and didn't know me at all,
The moderators of this site are not mediators.
So I guess the bottom line here is that it's not always a "Buyer Beware" situation, sometimes it's seller beware.
Right now I still buy off the CN classified's, but I'll probably never sell here again, well filter's anyway.
Still got a few DGM's, Lumicons, & Baader's to sell, but not here.