Common BOM you use, to buy or find

Hi, I am wondering what I should buy from aliexpress that will be used often. I am in the US, what parts should I buy for making my own HA hardware? The items I am looking for are mainly displays, LEDs, PIR sensors, AC/DC transformers, etc. I have some old computer power supplies I can use too. I bought some plantower air sensors too.

I have a 3D printer, and some screws and nuts for them too. I am not sure how many people know this but you can recharge ecig batteries, I have taken apart a lot of poshes and gotten the lithium ion battery inside, also an LED and air pressure sensor.