I'm a lousy salesman. I've always known this. I've found some success in online platforms because in those cases, I can let the product sell itself and I don't have to try to persuade someone to buy something from me. That being said, I'm a bit superstitious because of past experiences. Here are my superstitions:
1. Never package an item for shipment before it's actually sold. When I do this, almost invariably, something goes wrong. These are things that have actually happened when I had already packaged up the item: Buyer never pays. Buyer orders multiple items and wants combined shipping. Buyer wants to pick up in person.
2. Never pay money for an item with the intent of reselling it. I've lost a lot of money doing this. IF the item ever sells, it's usually at a loss.
3. Never count on an item selling. I just set myself up for disappointment if I do. Ironically, things that you'd think would never sell or things I got for free are the things buyers are looking for.
4. If I don't know whether the item works or not, it probably doesn't and if I don't put a disclaimer or sell "AS-IS" the buyer will discover that it indeed doesn't work and they'll want a refund.
5. If I don't overcharge for shipping, I will lose money. Every time. Just because I think the item is great and someone will want it, my opinion of it doesn't mean jack and the item will be sold at minimum bid, which will never cover for underpriced shipping.
6. Murphy's Law. Anything that could possibly go wrong, will. This is why I am so thorough in covering all my bases. If I miss something, it will definitely come back to bite me later. Guaranteed. If there's that one thing that I'm worried might happen, it does.
7. Damaged in shipment. If there's any doubt as to whether I've packed the item properly or not, I can be guaranteed that those who are handling the item will intentionally put my suspicions to the test... and confirm my worst fears. This is why I have to pack things so well that even if it's on any trip with Tom Hanks, it will make it safely to its destination.