Most sneaker sales that go wrong were decided before the parcel was taped.
Posting the pair in their own shoe box
For a deadstock pair the box is part of what was bought, and a courier label on it is value destroyed. It needs an outer carton. Packing sneakers.
Not showing the sole
It is the first place wear appears, and a listing without it reads as a listing with something to hide. Buyers assume more wear than there is.
Leading with the shoe instead of the size
The same shoe in a common size and a rare one are different items. Size belongs in the title, not in the fourth line of the description.
Cleaning hard the night before
A careful clean helps. Anything aggressive strips material, yellows midsoles unevenly and shows on camera. Describe rather than restore.
Calling a pair deadstock loosely
Deadstock means unworn with the original box. Worn twice is VNDS and should be said so. The trade has precise words and buyers use them. Condition words.
Guessing at authenticity
Neither a confident claim nor a nervous silence helps. Say where you got them and what you can show, and price an unverified pair as unverified. Buying sneakers is what the other side is reading.
The one that costs most
Hiding creasing. It is visible in any honest light, so a buyer finds it on arrival, and a found flaw costs the sale, the rating and sometimes a refund. A named flaw costs a little. Why naming the flaw raises the price.
Questions people ask
Should I replace old laces?
Only if you say so, and keep the originals in the parcel if you have them.
Is it worth selling a worn pair?
Yes, at worn prices, often in a lot with others.
Does yellowing come out?
Treat it as permanent and show it against something white.
More: selling sneakers, what they are worth.