Bidet attachment for your toilet bowl. Trust me, you’ll never go back.

Some chifi buds and a (Bluetooth) dac.

I have a pair of kz prx (planars, 37 bucks) and a hiby w3II (good enough over by and oké over cable, 40). If you don’t need by I will recommend the trn black pearl as it has the same parts as some of its more expensive counterparts

Electric kettle.

Bone conduction headphones.

Rechargeable head lamp.

Nice EDC knife.

Driving gloves.

A really good insulated cup.

French press.

Digital kitchen scale.

Slow cooker.

Bidet.

Yeah. I said it.

Blackout curtains in combination with a sunlight alarm clock to fall asleep more easily and wake up gentler without my phone.

LSD

A Game Genie

I was gonna say an OLED monitor but then i saw the 100$ or less

Low-profile noise-cancelling earbuds. Lived with a snoring roommate for some months, don't know how I would've slept without those.

A microwave sandwich griller. I saw one recommended on another of this type thread, so I gave it a try. You can’t believe how great this thing is. When I worked in an office, I had grilled sandwiches several times a week, and I still use it at home all the time.

https://a.co/d/4VSmebm

For me, literally game changing item is a game controller. For the games with native controller support it is awesome. Its easier and more confortable than mouse and keyboard. Of course it is not comparable with mouse and keyboard, especially in games heavily relied on mouse, but for anything else, on my opinion, it is a better option. My controller is quite cheap, but works well. I bought a controller to see what it is and how different it is for gaming, compared to mouse and keyboard. At first it was difficult, as i did not have an experience with controller, but now i enjoy it.

Noise canceling headphones. Yes, they exist for under $100, maybe not the best, but they’re a godsend.

Eyeing a rice cooker, it's really not a need-to-have but I might go for it... Edit: went for it and got one from my local asia market. :)

One of those flip boards for folding shirts, especially if you’re adhd, it makes it so you can neatly fold them and still see the front of the shirt so no more unfolding a bunch of things to check if it’s what you want and then just get left there unfolded

Shower curtain with pockets. Never again will you knock bottles off of those inadequate shelves.