1. Leandra Medine Cohen selling exclusive pieces on eBay till December 18. 2. Auction includes high-fashion brands like Celine and Prada, starting at $0.99. 3. Proceeds from sales will benefit Sharsheret, supporting cancer-affected families. 4. eBay's 'From the Collection' series promotes circular fashion through celebrity items. 5. Collection emphasizes unique fashion stories, appealing to style enthusiasts.