Jons Marketplace, a place for expired goods

I just purchased 3 boxes of Belgium assorted Chocolates and all 3 of them are passed their due dates. This is the 2nd time this has happened. The 1st time was a while ago where I bought a jar of Claussen Pickles.

 It tasted really fishy and that's when I noticed it was several months pass it's due date. I felt sick to my stomach. I guess they don't check their stocks for food that are pass it's due date. Maybe they do but are hoping no one catches it.

2 of the boxes indicate best before 9/12 and the last box indicates best before 3/12.  Still good?