So, did we all know this?:
https://www.pickles.com.au/info/bid-...ow-info#online
"It is possible to be the highest bidder on a Pickles Online item, but still not win the auction. This is because the vendor that owns the item may set a reserve price. If bidding reaches the vendor’s reserve then the item will be sold. However if bidding does not reach the vendor’s reserve then the item will not be sold."
Many of the vehicles in this Auction DO HAVE a reserve price, and will not be sold if that reserve is not met. No negotiating with the highest bidder, it's "reserve or nothing". They may consider the option of a Vendor's bid if the bids are in the vicinity, but not quite there yet. And they won't be revealing the reserve price.
