Britney Spears cousin and former assistant Alli Sims is trying to profit from her time as the pop star's leading aide - by selling the clothes, jewellery and accessories she was given as the singer's sidekick.Sims held a sale in Birmingham, Alabama on Sunday to try and unload cases of free stuff she no longer wants.A Spears family insider tells Life & Style magazine, "Alli literally got thousands of dollars worth of swag during that year she was at Britney's side. She hasn't been working, so she needs the money more than she needs the stuff."Surprisingly, the sale hasn't gone down well with the Spears family, according to the source: "She promoted the sale as Britney's cousin... and she's basically been cut off from any contact with the family."