I agree with you @Sean, that 50-66% of new price is a reasonable second-hand price. I think that sometimes items go up on sale at high prices in the hope of attracting unaware or inexperienced buyer. I know we should say ‘buyer beware’ and expect people do research. But, maybe I’m naive and idealistic, it’s not something I’d like to see on this great forum.
We should, I think, also be aware of the demographic of Basschat. A lot of Boomer males who are selling things not because they need the money, but because they want to buy something else or are de-cluttering.