Folks who won't negotiate.
Folks who price their gear out of proportion to recent sale prices.
Folks who state "fair and/or firm" pricing. That's for the buyer to decide!
Folks who abuse the quite strict Condition Scale.
Folks who don't CLEARLY list if any original accessories, documents, packaging etc. are missing, damaged or non-OE.
Audio manufacturers who spam the used ads. Two stand makers are guilty of this.
And that speaker manufacturer.
And that Somebody Audio whose tagline doesn't say what is actually being sold, but some irrelevancy like: Don't Miss This One! or Listen! Look! End of high-priced cables! You have neve heard it like this before! Grab this fast! Hand-built! Ends soon! Cheap can sound great!
Stop, Wasting, Our, Bandwidth!
cheers apo