The surf lesson Big Dyls (Dylan Cossey) from The Block NZ auctioned off for charity went for $1,000 last Saturday.
Mr Cossey was approached by Foster Hope, a charity who make up backpacks for children when they are removed from their home into foster care, to take a surf lesson for six people.
The lesson had steadily received bids to $250, when the last bid of $1,000 came in.
A spokesperson for Foster Hope said they were very grateful for Mr Cossey's support.
"And thrilled with outcome of the auction, the proceeds will go a long way to help out foster children in need."