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Harcourts Noosa sales associate Clint Jensen said 65 people had walked through the property and 15 bidders battled it out on the day.
Mr Jensen said typically when an auction has no reserve, potential buyers go in hoping to get a bargain.
However, he said it often goes in the opposite way and drives prices up.
"Because of the interest, I spoke to the owner about removing the reserve and letting the market decide, she put trust in me," Mr Jensen said.
"And that only boosted the activity.
"We had a mixture of people in person, on phones and over Zoom. It went to a Brisbane woman over Zoom."