Houston-area police are warning shoppers this holiday season to watch out for heavily discounted goods. 

Crime Stoppers' Rania Mankarious says this is the time of year when bands of thieves target local retailers, stealing items in bulk, then sell it on the black market for cheap.

“Something like baby formula can be stored in hot vehicles or warehouses where temperatures are unregulated, same with over-the-counter medication,” Mankarious tells KTRH News.

“Be aware these items are stolen, they can often times be tampered with and they're redistributed into the community with no regard for the health and safety of your family,” she says.

Whether shopping online, at a pawn shop or flea market, Mankarious says there are things to look out for.

“If somebody selling an item has multiple units of a new product, that's a red flag,” she says.

Organized retail crime costs the average U.S. household roughly $300 or more each year.