I respectively disagree.
My answer is: "it depends"
It depends on whom the buyer and seller agree as to whom will be responsible for shipping. If the seller ships the item and the buyer paid the seller's shipping costs, then there can be an argument that the buyer gave the seller permission to ship the item based on the description when the item was actually purchased, not received.
I know people that refuse to take responsibility of the shipping of an item that they are selling. Quite frankly, I don't blame them. Some people are window shopping. Where they purchase an item, receive it, and then decide that they changed their mind or don't like the sound, even though it worked fine. They then declare to paypal that the item didn't work correctly and paypal will refund the money. I am not a store. There is no lookie loos here for me. I advertise the item accurately. It works as described when I sell it. That's me. I treat people as I want to be treated.
I sold a Mercedes to a gentleman in Germany last year. I'm the seller, so who is responsible for shipping??? come on, I have time, I can wait. No way on this planet will I be responsible for shipping. There are many reasons, but my point is that again, it depends.
I've sold many items here on Audiogon, many times the buyer agreed to the purchase on-line, came by, listened to the item, paid and took it home. Other times, I shipped the item in the manufacturer's shipping boxes (I keep the shipping containers) and crossed my fingers. The buyer naturally paid the shipping costs.
But, again, it is not cut and dried on this. it depends. If I have an item for sale and I'm afraid of shipping, I'll advertise it as pick up only. if the buyer really wants it, he/she can arrange for someone to come by and hear it work, pay for it and take it. or the Buyer can arrange for shipping personally.
Again, it depends.
enjoy