Startifacts, with offices in Minneapolis and Las Vegas, made the announcement after Haim's family posted a plea on his Web site seeking fan donations to transport his body to Canada and cover the funeral.
Startifacts owner Michael Kronick said he would give Haim's family a check for $20,000, before the auctions even end, TMZ.com reported.
The star of "Lucas" and "The Lost Boys" was found dead Wednesday in the apartment he shared with his mother. He was 38.
A cause of death has not been determined.
His funeral has been scheduled for Tuesday at the Steeles Memorial Chapel in Thornhill, Ontario.
Copyright 2010 United Press International