op
as stated by others... we as audiophiles (and retailers who serve them) should view ourselves as a community of like-minded, collectively invested hobbyists... we are above all else people that deserve fair and reasonable treatment on both sides of a transaction that is mutually agreed upon
when you sell something to a fellow hobbyist, there should be mutual good will... to be honest, to be reasonable, to see the deal for what it is
part of the fun of buying used hifi items as hifi hobbyists is to be able to try them at a price much less than new, and then resell them at minimal financial loss if we move onto something else of interest later ... the buying and selling process is part of the ’work’ involved to have this benefit of in depth trial and ownership
this is different from retailers who are in business to make a profit (where you usually pay full retail), it is generally considered unreasonable to expect a private seller to take back an item for full refund unless there is something patently wrong with the item just received
just like buying a used car from a private party... as a buyer do your homework and due diligence, make your decision, if you buy it it is yours, you want out later, you are responsible to sell it as you see fit ...