I sent this buyer payment reminder and he send new payment. I had another buyer with same issue 2 weeks ago, he ignored my request. I would post his ID but Jerri from eBay Moderation Team might get too excited.
The problem with live-chat is that you sped 20-30min on it. If sale was $10, FV fees are $1 if you are TRS, then your effective payout for this task is $2/hr. Cheaper to let go, say it's tip for Jerri to keep us safe here.