2. When you sell an item on Ebay or Etsy, ask the buyer to PAY IMMEDIATELY. Or else you might be stuck with someone who wanted expedited shipping, then doesn't reply to your emails for four days.
Learned this one the hard way too. Just specify how and when you want to be paid when you create your listing.
And buyers, please check your messages and emails. Or you might have an angry seller giving a Second Chance offer to someone else.