There are sample sales. And there are warehouse sales. Guess which has more good stuff marked down to embarrassingly low prices? Yup, the warehouse one.

And suddenly, there’s a company called Warehouse Sale that’s been staging biggie sales in L.A. Its next one — featuring Citizens of Humanity, Morphine Generation and a bevy of other dept. store brands — runs from Dec. 18 (Friday) to Dec. 20 (Sunday) at the Los Angeles Convention Center.

And get this — the sale will offer around 20,000 piece of clothes, including men’s and women’s jeans and a full range of tops, jackets, dresses, sweaters, skirts and shorts, at up to 80 percent off retail. Additional lines include 7 For All Mankind, AG Jeans, Antik Denim, BCBG, Chip & Pepper, Christian Audigier, Ed Hardy (but don’t let that stop you), Frankie B., Laguna Beach and Monarchy.

Among the wares will be 3,000 pieces for men and women from Morphine Generation designer Erik Hart’s namesake line, and more than 5,000 items of Smashbox makeup products for lips, eyes and cheeks starting at $5.

There’s more: Shoppers who buy four items will receive a fifth item free (the cheapest one in your grubby little hand.) Sound just like the shop-till-you-drop opp you were pining for? Register in advance at thewarehousesale.com to receive an invitation to the event for expedited entry.

Hours: Friday, 12 p.m. to 8 p.m.; Saturday and Sunday 10 a.m. to 6 p.m. Los Angeles Convention Center. 1201 South Figueroa Street, Los Angeles.
Photo: A look from Morphine Generation’s Holiday collection, courtesy of Morphine Generation.