Buyers not paying and pulling out of the trade

There seems to be more people buying items on trade me and not paying and collecting and wont answer emails Trade me should address this as its time wasting for sellers

Kia Ora Suzie,

When you apply for your Success fee refund(s) TM contact the Buyer to initiate communication and remind them of their obligation to complete the Trade - Note is placed on these Buyers accounts - should this be a regular or common trait account restrictions will be placed on the Buyers accounts at TM's discretion - TM can't divulge what action they may take behind the scenes as this would be a breach of Privacy - Cheers.

Suzie. While this is happening more generally now, however there is always a surge of non payment before and after xmas. Presumably people on a buying spree then they look at their bank account and bail out. If you select Ping payment as the only payment option, then I believe buyers cannot win listing unless its paid for at the time. So this method can eliminate non payment. But saying that, this then excludes a % of the market who want to do bank deposit/ pay cash on pickup, and so you are limiting your customer base