Do you happen to have a link for your HP t6x0 reference? I tried https://www.ebay.com/sch/i.html?_nkw=hp+thin+client+32gb+-(4... and there seemed to be plenty with 32GB of storage but none that I could find with that much RAM
That’s because you have to add the memory yourself.
Just took a quick look- appears t730 is of DDR3 era and may only have a single slot.
t740 definitely has two slots https://www8.hp.com/h20195/v2/GetPDF.aspx/c06393061.pdf
Sorry I was imprecise. I typically buy the cheapest one I can find with a power supply. Last year t630 were the sweet spot. They typically ship with 4 or 8… the windows models have higher spec. I picked up a couple of t730s too. I add third party memory and storage if needed.
You get a super capable, low power device in the price footprint of a raspberry pie.