Kendall Jenner is selling some of her designer clothing.

Kendall Jenner

Kendall Jenner

The 20-year-old supermodel is using the Secret Closet app to offload a number of pricey items she no longer wants.

These include a red leather Saint Laurent bag for $1,000 and a white Chanel bag for $1,300.

She is also selling an Acne Studios biker jacket for $600 and an Alexander Wang outfit for $800. It is stated that the prices are non-negotiable in all cases.

The clothing is all sample sizes, ranging from small to extra, extra small and condition of the items range from new and perfect to good.

Kendall tweeted: "See what I'm selling on @secretclosetnet where you can buy/sell high end items directly from your mobile device (sic)."

She also included her ID on the site so that people can check out her offerings.

Kendall's sisters Kylie Jenner and Kim Kardashian West are also big fans of the app, which allows users to take pictures of items in their closets and put them up for sale on the app.

Other celebrities who use the app include Vanessa Hudgens, Bella Thorne, Irina Shayk and Amber Rose.