The dollar volume of sales on the island last year totaled a record $1.86 billion, nearly twice that of the year before, according to the local multiple listing service.
"It was the busiest sales market I've ever seen on Nantucket in my 30-plus years of selling real estate," said Edward Sanford, a principal and broker with Great Point Properties.
Sanford said buyers went big, setting records at high price points across the board, in the $2 million to $10 million range. This year the competition is even more fierce.
"A property that was worth $1.7 million last year is going to go on the market for $2.5 million this summer because we're in that amazing seller's market," he said.