Good advice from a one of the greats in the business.IMHO it depends on seller and buyer. As a retired seller I did accept any and all returns, as long as the item was returned in the condition it was sent out.
However .... IF ( and only IF ) the buyer had not read the description and asks to return an item because they did not read all the information .... while it was accepted as a return, a mental note was made of the buyers name. ie = return because the pipe is too short, or chamber too large etc. Then it did sort of leave me slightly peeved.
IF the buyer emails and says ..... Mike it just not what I was looking for, or I don't like the balance etc, no issues. Sent it back, no worries.
IF the seller did not fully describe or disclose as much information as possible, then shame on the seller and they should have no problems accepting the return.
It doesn't matter if you've sold 10 or 10,000 items. Returns for whatever reason are part of business. Accept them with politeness and respect towards the buyer. As a seller that one return accepted "properly" could lead to a long term client that ends up buying many items. Being a "dicK' about a return almost guarantees you've lost that buyer forever.
YMMV ......
I don't sell many pipes on eBay, but have never had a return.
If there is a defect, or undisclosed issue, I take good photos and ask for a return regardless of their return policy.
My eBay pipes are sold as "no returns", but if a buyer doesn't like the pipe, no matter the defect, eBay would make me complete a return.
I've sold many pipes here and only had one request for a return. A member pestered me frequently about buying a Peterson that I owned. After many months, I said sure, I'll sell it for XX. I took my usual 11 photos (I'm not Ansel Adams, but I think my photos are pretty decent, and I spend some time listing a pipe). When he received the pipe, he said the grain was disappointing, would take a return. I reminded me that he pestered me for this pipe and then said he would keep it. That bugged me.