Nicole Richie's Engagement Dress -- Now On Sale!

Nicole Richie heads to traffic school yet again in Van Nuys, Calif. on Wednesday.

Though Nicole‘s 2005 plans to wed Adam “DJ AM” Goldstein fell apart a while ago, she held on to a special souvenir: the vintage Halston dress she wore to her engagement party. But now she’s ready to let it go – to your closet!

The gorgeous gold gown – worth more than $10,000 – is being sold at the chic consignment store Fisch for The Hip in New York. At size 0, it may not fit the average shopper, but it’s being sold for the relatively bargain price of $3,000.

“Nicole loved this dress. It’s a piece of art and she was so excited to wear it for her engagement party to Adam,” an insider tells In Touch, pointing out that because Nicole is now with Joel Madden, father of her baby daughter, Harlow, “It was time for a change, obviously.”

Nicole, 26, is reportedly shopping for a new Beverly Hills home with Joel. They just bought a condo in NYC, too.