The vibrator of slicing.

This is a knife with two saw-like blades that move back and forth, allowing enhanced slicing of cooked or raw meats.

It gives advantage on all intimidate checks, with a +2 if wearing fishnets and/or high heels

I always try to have 2 Immovable Rods with my character so I basically have an infinite ladder. You can lock and unlock each rod and use them like rungs to climb things, cross gaps, etc. And they’re not really rare or expensive.

Maybe add the opposite of those; rods that never stop moving.

Deck of too many things, it’s a deck of regular playing cards that constantly vomits playing cards when opened.

Earrings of No’Kyah: allows wearers to communicate by touching the earring while talking across any distance. Are also indestructible.

Boots of Courage: Provide +3 to initiative rolls, but have a 15% chance of tripping the wearer and leaving them probe each round they are retreating.

Cook Pot of Concealment. Any edible item in the pot is invisible to a creature that could eat it until removed.