One of the most extraordinary auctions in Queensland's history will take place today with the luxury possessions of a fake prince to go under the hammer.

The Public Trustee is selling items owned by Joel Barlow, the former public servant who embezzled more than $16 million from Queensland Health while posing as Tahitian royalty.

There are 1,500 items to be sold, including kitchenware, a Brett Whiteley screen print, two apartments, watches and even Barlow's half-used soap.

Some items still have police evidence stickers.

Auctioneer John D'Agata says they hope to retrieve up to $300,000.

"Look it is an extraordinary collection. He bought very well. He bought signed pieces. And so it's a really interesting, really interesting auction," he said.

Barlow is due be sentenced later this month.