The European Consumer Centre in Dublin is warning people to think twice before buying a car online.
It says it has received a number of complaints from people who paid for second-hand cars online, but the vehicles were not delivered.
Caroline Curneen of the ECC says that when in doubt, would-be buyers should always purchase from reputable dealers.
"People have paid a lot of money here, they're looking at six, seven, eight thousand euro for these vehicles, and they're paying by bank transfer, which gives them no recourse if something goes wrong," she said.
"In these cases, the consumers didn't actually go to view the car themselves, the car was allegedly based in the UK, so we would really urge people to obviously check the car that you're buying and not hand over any money until you've physically collected from the seller."