Comment by heywire

Under $100 - an electric head shaver.

I started balding in my mid 20’s, so I shaved my head with a BIC disposable and shaving cream. I kept up this routine for probably 15 years before seeing a curved electric razor made for heads advertised to me. I picked one up on a whim, and it has been great! It takes me around 1 minute each morning compared to 5-10 before, and I no longer have to worry about nicks. It uses about 1% battery each shave, so I only have to charge it every couple months. It truly has been a great quality of life improvement.

[1] the one I use is called the Hummingbird MK3, available on Amazon for around $60.