(CBS) -- From electronics to designer handbags to shoes, they look like some of the hottest items this holiday season.
But U.S. Customs and Border Patrol says they're all fake.
Nationally, the number of seizures has risen every year since 2007 and jumped 25% in 2015.
Last year, officers seized $1.38 billion in counterfeit goods and made 451 arrests.
Federal investigators say most of the knockoffs have been coming from China and Hong Kong, but recently distributors have been changing the countries they're shipping from to try to fool inspectors here at the port.
Homeland Security Investigations agents say it's not a victimless crime. Sales of counterfeit goods often benefit terrorist groups
"You have organizations such as Hezbollah that are using counterfeit to source their efforts abroad," says Angel M. Melendez with ICE Homeland Security.
Here in the U.S., victims include companies and their employees that sell the real products, and consumers who might buy something they think is safe, including electronics, prescription drugs, and cosmetics.
Customs officials say avoid buying from non-reputable retailers, and always notice the price. If it seems too good to be true, it probably is.