The co-founder of technology distributor Dicker Data, Fiona Brown, has emerged as the buyer who placed the winning bid on a $12.1 million sandstone home in Paddington, in Sydney’s eastern suburbs.

In an increasingly rare move for high net worth individuals, Ms Brown was self-represented at the crowded auction held in late October, raising the auction paddle several times against her sole rival to push the $11 million guide up to a $12.1 million before the hammer fell.