Blocking new ebay members from purchasing items.

Hi, I hope someone can help me please.  I recently started selling on here again after a year away.  This morning I received an obnoxious message from a member about one of my items being overpriced.  I replied back and said it had been priced according to previous sales of the same item and then I blocked said member.  Later that day my item was purchased by a new member that was registered that same day with 0 feedback.  My item was collection only and this person said he chose home delivery but on order details it clearly states collection.  I believe this to be the same person.  How do you block new members with say less that 10 feedback.  I know there used to be an option but I cannot locate it.  Or has ebay removed this.  Which means I could be targeted all the more from this idiot.  Any help appreciated.  Thank you.