Collett said the vendor had a heart of gold and she went by the motto that life was all about experiences.
"It's a wonderful experience for our vendor to be able to gift such an amazing prize to the purchaser and on the other hand it's amazing for the purchaser to be able to have a first-class experience like this."
The vendor also recalled money being tight when she purchased their first property and not being able to afford to go on holiday so thought it would be a nice treat if a first home buyer bought it.
"Ideally, it would be amazing if a first home buyer could get the property but we understand the price point - with the rental potential this could potentially help leverage extra funds to assist with mortgage payments."
In July, Century 21 listed a Waitoki mansion for sale with the new owner's choice of Maserati worth up to $250,000.
The property is still on the market for $6.295 million, but Collett said including the key to a brand new Maserati it had been "a massive cherry on the cake".
"People have seen this as an added bonus and have loved the Maserati merchandise we have been able to give to prospective purchasers."
See the listing on OneRoof.co.nz