Shows up Tradedx.net LLC on caller id - they don't leave a message. I don't answer it because I don't know who they are. Nothing shows up for them when you search on the internet... just a company name & date formed...

This number came up on my caller ID. I answered it, figuring I would just tell them to bug off. It turned out to be my sister calling from her house. Now I'm wondering if there's a scam where someone is able to piggyback a house phone? Just a thought.

Said they were publishers clearing house and we had won a large sum of money and all I had to do was go to the Dollar General store and get my prize verification card.

Don't do it! Publisher Clearing house don't need you to buy a card. bet it was One  Vanilla

PCH:
It is a scam:
http://info.pch.com/consumer-information/fraud-protection

Its ILLEGAL to ask for money to receive it.
Prize Offers: You Don’t Have to Pay to Play!
http://www.ftc.gov/bcp/edu/pubs/consumer/telemarketing/tel17.shtm
http://www.consumer.ftc.gov/scam-alerts
http://www.consumer.ftc.gov/articles/0076-telemarketing-scams