At Stellafane they have a swap table, where fellow enthusiasts sell the stuff that they no longer need.
I picked up an equalizer (compensates for the weight of 2″ eyepieces while using 1.25″ eyepieces so one can just counterweight the scope and be done with it (I no longer have to ask my child to be tied to the other end of the scope). I also got a Peterson mount for my 25x100s (it ain’t pretty, but it lets me use the 25x100s at zenith), and the seller threw in a set of Oberwork 20x90s with a 1.5x finder for $110.
I think I did well.
Of course, as someone here said, if I don’t like it, I can always bring it back and sell it at the swap table. I responded to him that now I understand why there are people here who have come to each Stellafane since 1969, to much laughter.