Former Wallabies coach Bob Dwyer was the surprise winner of an online auction for a set of rugby union goalposts that stood at the All Black's spiritual home for 50 years, organisers said on Monday.

Dwyer paid $NZ15,050 ($A11,540) for the goalposts from Auckland's Eden Park, where the All Blacks won their only Rugby World Cup in 1987.

Money raised from the sale of the steel goalposts, that weigh 700 kilograms each and stand 18 metres tall, will go those affected by last month's 7.0-magnitude earthquake in Christchurch.

Eden Park marketing manager Tracy Morgan said while there were initial suspicions the Bob Dwyer who won the auction was an impostor, she had confirmed the former coach of Australia was behind the bid.

"I haven't been able to find out what he wants them for or how he plans to get them to Australia," she said.

The uprights have been in place since 1960 and were used during the All Blacks' victory in the inaugural 1987 World Cup.

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