1) A bidet! Got one in the pandemic when toilet paper was scarce and I wanted to be more efficient, but now I'll never go back. The Tushy ones are good.

2) A safety razor & accessories. I get a cheaper, closer, less irritating shave, and I get to customize every part of it. This can certainly be a rabbithole you spend a lot of money on, but you can get a solid customized starter kit for under $100 that will be totally solid, and from then on you're saving money over cartridges and gel unless you really want to splurge.

I'll second the electric toothbrush suggestion too, its great having my teeth fel clean and smooth.

- A dumbphone. Even if I’m not using it anymore, it has shown me what life I could be living without distractions. My anxiety and stress levels went down from about the second day using it, I became much more aware of my emotional state and the environment around me, it was a noticeable shift.

I no longer buy the arguments that we can control our smartphone addictions with will. The technology is too optimised for most of us to break free. And the addictions — too subtle for most to notice.

It may simply be a physiological addiction to checking email or for notifications every now and then. If you feel like you’d be missing out unless you check your phone several times a day, you have it. If you reach for your phone without thinking when you’re bored, you have it. It’s all about compulsive action.

I think much of the population is addicted. Certainly most of the online types.

Every interaction with your phone pulls you out of being present!

Voice lessons at the local community school of music. I'm a lifelong musician, but was an almost entirely solitary one. I taught myself different instruments, but I never felt like I could get to basic competency teaching myself to sing. I decided to spend ~$200 for a semester of weekly 30 minute lessons. (The community school cooperates with the local university to offer lessons taught by university students for a low rate.)

My singing improved (more work is needed), but the life-changing thing was getting involved with the local music community. It turns out they have a shortage of piano teachers--I had mistakenly assumed there would be plenty in my town! So I started teaching piano, which had long been a dream of mine. The school also connected me to local performance opportunities that are now a part of my regular music routine. And ultimately, the experience encouraged me to enroll as a (part-time) music student at the university, which itself has been extremely enriching and a tremendously positive community experience.

- Robot vacuum (with mapping+LIDAR): Major game changer. I should have bought this years ago! The tech is now good enough that it basically never gets stuck unless you leave cables lying on the floor. It costs about as much as it would to hire a cleaning crew for a day. And this will do clean your house every single day!

- Bidet Seat (Heated)

- Chest freezer: Unlike the anti-car people on Reddit, I don't consider grocery shopping to be something I want to do every day. I can now get by with 1-2 trips for a whole month for two people. It also helps reduce food wastage once you figure out how to freeze your commonly used perishables that take too long to use up (e.g. heavy cream "ice cubes", frozen bread loaves etc.)

- Noise cancelling headphones (Sony XMs): I use them everyday and love the distraction free environment it creates (combine with MyNoise.net at work).

Under 100:

- Immersion blender: surprisingly versatile. The "barrier to entry" is smaller especially since it is super easy to clean compared to a blender (chuck it in the dish-washer).

- Electric toothbrush (granted it could be slightly over 100 for the one I got)