Dealing with eBay

I love eBay.  It's a great place to buy and sell sports cards.  However, there are definitely some quirky buyers and sellers.  Here are a few of my favorites:

1.  The buyer who lowballs you, but says, "I'll pay right away!" Great.  99% of people pay right away.  You're not really setting yourself apart.

2.  The buyer who asks, "What's the lowest you'll take?" Just make an offer.

3.  The buyer who gets upset when I won't accept their offer.  It's my card.  I set the price.  If you don't like it, just move on.  No need to get angry.

4.  The seller who posts a graded card and includes a "Regrade?" at the end of the title.  If you're so confident, you regrade it.  You'll make more money.

5.  The seller who includes "Looks undergraded to me" on almost all of his graded card listings.

6.  The buyer who reminds me of recent comps, then sends a lower offer in.  First of all, I follow the market and subscribe to VCP.  Second of all, don't tell me that a card has been selling for $2000 and then offer me $1800.

What are some of your favorites?