Speaking after three men were convicted of killing Teddy Simpson, 56, his relatives said they could never forgive his "senseless and cowardly" killing.
A jury heard car dealer Mr Simpson was targeted by a gang who hoped to find £300,000 at his home.
Instead they got away with just £15.
Decosta Daniel, 29, Errol Witter, 27, and Robert Cameron, 28, were found guilty of murder and conspiracy to rob at Leeds Crown Court. The three, all from Leeds, were accused of attacking Mr Simpson in his home in Sticker Lane, Laisterdyke, Bradford, last August.
His battered body was found by two workmen near the former Shirley Manor residential home, off Huddersfield Road, Wyke. His hands had been tied behind his back and his ankles cuffed together with his trousers. His face had been shattered by severe blows or stamps. There were more than 50 external injuries and his body had been partially wrapped in a curtain.
During the two-month trial, the jury heard how the gang beat and tortured Mr Simpson because he was an easy target.
Prosecutor Tom Bayliss QC said the robbers hoped to find £300,000 cash and possibly drugs at his home.
Mr Simpson, a father of four, was dragged from his house, leaving a trail of blood, before being dumped in Wyke.
The jury unanimously cleared Mumtaz Ali, 37, of Wibsey, Bradford, of murdering Mr Simpson and conspiracy to rob him.
They could not reach verdicts on three other men. A retrial is expected for Anthony Davies, 27, of Lloyds Drive, Low Moor, Darren Martin, 37, of Markfield Avenue, Low Moor and Anthony Neale, 28, of Harehills, Leeds. All deny murder and conspiracy to rob.
An eighth defendant, Sonny Stewart, 26, of Bankfoot, Bradford, has admitted manslaughter and conspiracy to rob.
The men will be sentenced later.
Mr Simpson's family said: "The senseless and cowardly way Teddy was tortured and murdered will leave us never forgiving.
"They hunted Teddy down and murdered him for £15, taken from his grandchildren's money box."