Last November, Victoria Beckham gave away a mountain of luxe designer shoes to raise funds to help victims of the catastrophic Typhoon Haiyan. Now, the designer is going back into her closet for another good cause — and this time, she’s digging deep into the Posh fashion archives for a huge sale that any of her fans can shop.

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Posh is teaming up with The Outnet to sell more than 600 pieces from her personal wardrobe, with all the proceeds going to benefit Mothers2mothers, a charity that aids mothers living with HIV. On the list? The fluorescent yellow Roberto Cavalli dress she wore to a 2006 World Cup party, a Mandate of Heaven tutu minidress worn for the book That Extra Half an Inch and the Dolce & Gabbana dress she wore to the 2003 VMAs (pictured above), which will be part of a reverse auction, where the asking price will be reduced every five minutes until someone snaps it up.

“I laughed a lot when we were going through my wardrobe, as the pieces hold so many happy memories for me, David and the children,” Beckham said in a statement. “A lot of the clothes have been specially designed for me by the most talented designers, and I’ve loved wearing them, however I feel it’s someone else’s turn to enjoy them.”

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Want to get your hands on the glamorous pieces the star wore when hitting the red carpet with now-husband David Beckham back in the early aughts? Or perhaps you want to “shake it to the left” in some of those famous Posh Spice minidresses? The clothes will hit the Outnet on Aug. 20 for a five-day sale.

What do you hope Posh is giving away? Any favorite fashion moments on your wish list?

–Brittany Talarico