Inspired by another thread where a poster commented that another buys Pringles for Xmas when they are available all year....
For us
Cranberry sauce - I never bother rest of year even though I love it with bacon and Brie
Brie come to think of it, prob because of the cranberry thing
Chocolate oranges
Baileys
Those teeny tiny pickled onions
Mini marshmallows for hot chocolate (in December really)
Tubs of dry roasted peanuts
No logic in most of it. I know I could buy but I just don't.