There are also refurbished pc’s at Amazon for sale at big discounts. About 11 months ago I bought two HP z240 SFF pc’s from Amazon. One for my sister and with a credit I got from a credit card company it cost just $17+ : )
For mine it was the $135+ listed with s/h. Mine was built in 2018.
When the model first came out it sold for $3,265 !!
https://www.amazon.com/HP-Z240-Worksation-Bit-Multi-Language-Supports/dp/B085LMQQLC
It has a 1TB Samsung SSD (room for 3 HDs), 16gb ram (can take 64gb). i5 7500 cpu. Windows 10 Pro. The cpu is not good enough according to microsoft for Windows 11 but you can still install with workarounds but I do not want to be a Windows 1 beta tester.
Yes, I mentioned in post 25 that I purchased used HP super slim desktop computers in 2019 to hook up to our televisions to use with a program called Audials that records and plays back streaming video. They are about the size of a DVD player, and do have DVD drives in them. I use them with wireless mice and keyboards. They still work extremely well for this purpose... We also use them viewing web pages on the TVs. They cost about $150 at the time, but our less than $100 these days