Ever Buy Meat Off Those Gypsy Trucks

Bingo thought this was worth mentioning said
1

Just had my once every 6 months or so knock on the door from some random dude in a pickup truck offering to sell me "the last couple steaks for 50% off so he can go home for the day!".
I've always avoided them and don't know anyone who ever has bought meat from them but they seem to stay in business so I'm guessing someone is.
So - anyone ever bought anything from one? If so, how was it? Did you die? Get ebola? Hep C?