Last night, someone mentioned his ThinkCentre for his homelab. And since then I've been searching the web for different solutions for a homelab, mostly thin clients. There are interesting low-cost offers. One of my favourites at the moment are HP t640 because of their embedded Ryzen CPUs. But as soon as I look for just a small upgrade the price "skyrockets" from 80 Euro for the t640 to 190 Euro for the t740. When looking for new hardware there's currently an offer for the Acemagic K1 with a Ryzen 5 7430U barebones for 210 Euro and with 16GB/512GB for 280 Euro. This CPU has much more power than the older embedded ones while still running with a 15W TDP.
For assessing the difference between CPUs I often resort to cpubenchmark.net: https://www.cpubenchmark.net/compare/5991vs3574vs3486/AMD-Ryzen-5-7430U-vs-AMD-Ryzen-Embedded-V1756B-vs-AMD-Ryzen-Embedded-R1505G