Lynne, who is Becks' big sister, has been reduced to off-loading her belongings for as little as £2.
She's selling off clothes, second-hand paving slabs and an old oven via Facebook.
David, 43, who has an estimated fortune of £339 million, hosted a blowout bash for the rest of the family.
He rang in 2019 with his younger sister Joanne and mum Sandra, but Lynne was not there.
David and Lynne are reported to have fallen out in 1999 when she married.