Discussion from Geekzone
Link to TM fees page
Maximum success fee will go from $249 to $349.
Current success fee is a flat 7.9% across the board. This will change to 5.9%, 7.9%, and 9.9% depending on the product category.
In–trade sellers from 1 November 2021
On 1 November, we’re changing our success fee cap and pricing structure for professional sellers.
The maximum success fee will go from $249 to $349, and success fees will have a three-tiered pricing structure, based on listing category. The new success fee tiers will be 5.9%, 7.9% and 9.9%.

I recently reported a TradeMe trader to the IRD who had over 12,000 trades and didnt have the "in-trade" status. They claimed to have sold over 130 PS5's and Xbox Series X's (roughly over $60,000 undeclared income) whilst also selling other peripherals. I emailed TM with the IRD report submission as well as all screenshots and a day later that account immediately had the "in-trade" status hahahahaha