It depends on what the person you want to give something to likes and how much you are willing to spend. If you are willing to spend a few 100$ i would buy an electronic gadget like: smartphone, tablet, smartwatch, google home, ... Electronics generally sell very well and people often use it for gifts.
A gift doesn't have to be expensive, i have found some unique gifts that cost less than 30$:
Elfinbook Smart Notebook: erase notes with water, heat or the micro wave so you can use this notebook again. More friendly for the environment than regular paper and saves you money. (https://amzn.to/2Se7OkI)
JZBRAIN Multi-port USB Charging Station: charge 5 of your electric devices (phone, tablet, etc.) at once with this fast charging docking station. No more empty phone battery! (https://amzn.to/2B0IvZR)
Hallomall Sunrise Alarm Clock: this alarm clock makes you wake up gentle and gradually. Great for people who hate waking up. (https://amzn.to/2SffJhI)
YUEGANG Flameless Candles: they look like real candles but work with leds instead so no need to make a fire. Still it's more decorative than normal led lights would be. (https://amzn.to/2Wnkoh1)
What is the best item to buy for someone as a birthday gift? | Ecency
Amor a tiempo (y un carro accidentado): Lecciones de un cumpleaños sorpresa|Love at the Right Time (and a Wrecked Car): Lessons from a Surprise Birthday