What are some of the best purchases of your life?

For me it has to be:

1. Helix mattress ($1,217). Sleep is great.
2. Home gym power cage & weights (~$1,000). Look good, feel good, get strong.
3. Netgear Nighthawk AXE7800 ($339). No more random, annoying internet disconnects/slowness.
4. Books ($0 @ library)
   • "Ultralearning" - Scott Young (how to learn efficiently)
   • "Enlightenment Now" - Steven Pinker (the world overall is improving)
   • "The Bogleheads' Guide to Investing" - Taylor Larimore (how to invest)
5. PS5 ($500). So many great games like witcher 3, god of war, spiderman.

I'm searching for some more deep value purchases. Give me what you've got.