This category has one mistake that is not a pricing error but a policy breach, so it goes first.
Listing before checking the recall
Recalled goods may not be sold here, and that applies especially to anything for children. Look up the model before you list. Prohibited items.
Treating a missing safety part as a discount
A missing strap, buckle, pin or fixing means the item may not be sold — not that it is cheaper. That is the rule, and it is the right one.
Not giving the model number and date stamp
With both, a buyer can check the recall themselves. Without them they are trusting you, and most will not.
Not mentioning a car seat's expiry
Seats carry a manufacturer expiry date. Find it and say it. And a seat that has been in a crash should not be reused, even where nothing shows.
Not saying what you know about the history
"I bought it new and it has never been in an accident" is worth real money. "I bought it second-hand and cannot say" is honest and prices accordingly.
Not washing, or not saying what you washed
Buyers here look closely and reward honesty about it. Say what you cleaned and what could not be cleaned.
Losing the small fixings in the packing
Bag them, label them, write the count on a note inside. Packing baby items.
The one that costs most
A small stain not mentioned. In this category it is noticed, and it costs far more than it would have as a disclosure.
Questions people ask
Can I sell a car seat?
Where it is not recalled, not expired, complete, and you can speak to its history.
Does the manual matter?
For anything that must be installed correctly, yes. Link the manufacturer's if the printed one is gone.
Are clothes worth listing individually?
No. Size lots, washed, counted.