Make sure you get your money first, then ship. Especially if they're paying via echeck, this takes a while to clear and put the funds into your account.
Make sure to ship with Delivery Confirmation (aka tracking), this way if they try to say the item never arrived, you can give paypal proof that the item was shipped/delivered.
Every time I open the fridge, the hole in my jello glares at me.
Thank you for completely removing my signature without emailing me that it was too long.