But now, the Evansville Police Department is offering a safe place where those transactions can take place - the lobby of their main office.
You can find some great deals on Craigslist and eBay. But meeting a stranger to make the exchange comes with its risks. So the EPD is helping reduce the danger that comes with these transactions.
SGT. Jason Cullum tells us, "What we want to do is invite people to use our lobby during regular business hours. They can meet the seller or buyer face to face and they can conduct their transaction. They're guaranteed to have a safe environment here and it will deter the scammers."
Melissa Winternheimer of Evansville says she's happy to hear EPD is opening its door, as she occasionally shops online,
"It's a lot safer because you hear stories about things that have gone wrong on Craigslist and things. I think it's a good idea for people to know it's safe to go there. They can make purchases and sell things without worrying about anything happening."
Andrew Effinger bought his truck on Craigslist and says he would use the lobby next time he buys online,
"I think it's a great idea. I think anytime you can get away from the sketchyness of craigslist , I think it could help."
Should you buy a car from a stranger, the EPD is willing to help for $5.
"With a vehicle, when you come down here, you can actually request an officer to do a VIN check. We'll check the VIN number on the vehicle and make sure that it's not stolen," SGT. Cullum tells us.
The lobby is open Monday through Friday from 7:00AM until 5:00PM and closed on weekends.
Officers are NOT involved in the transaction. The police are just offering a safe place for the transaction to take place.