Gifts and cards

To those of you that sell gifts and cards in your shops, do you find that they sell together in the same transaction or separately?
I make and list gifts in my shop but I make cards that I only sell at fairs. So im thinking of listing a few cards.

I sell individual birthday cards but I think next year I’ll try packs of Christmas cards.

I sell Decorations in groups of 2, 3, 4, or 6’s.