Auctioneer John Mowbray, of Otaki, says an upcoming stamp auction could be the first such auction held in this country in which sales were expected to exceed $2 million.
Among the items is an old, unused postage stamp with an estimated value of $50,000.
In total there is approximately $2.2 million worth of items, with 1434 lots of stamps and 552 lots of coins, medals and banknotes - varying in age, origin, condition and rarity, as well as the odd error.
The stamp with the $50,000 price tag was a mint-condition HMS Vanguard, printed in New Zealand for the 1949 Royal Visit by King George VI.
Mr Mowbray expects up to 100 people at each lot's auction, and a lot of absentee bidding by phone, email and even post.
He says to think that an auction attracting such worldwide interest, and producing such sales volume, can put it together here in New Zealand, let alone our humble base in Otaki, is quite satisfying. Actually, it's pretty exciting, he says.