Someone just moving decommissioned servers from a data center to new users without doing anything with the equipment in between allows you to find decent deals if you're looking for something to put in a rack.
Be aware that rack servers are usually rather power hungry, so they might be expensive to run over time.
I have the app installed and the shipping costs to Eastern Europe where I live often surpass 50% of the price of the tech itself.
I'd love to reuse. A lot of us out there who are still oldschool-ish and can work miracles with older tech. But I am not about to spend the same money I'd spend on simply building a PC with EATX case and the ability to shove 12 HDDs in there. I'd still end up spending more on the local market, mind you, but we're looking at 10-15% maximum and I don't find that a worthy difference to wait 3 weeks for an older server, especially with a very high likelihood of also having to pay 20% of the value of it to customs.
Whether it's worth it will depend on what you're looking for.
I expect there would be more of a glut of this stuff where there were lots of server farms and web tech businesses. If the scale was much smaller in your area compared to the US, then of course less servers are discarded.
Still not at all important for me, not until I move in in my own place which is due in 2-3 years. But after that happens I'll definitely want a few servers in a closet.
As one myself I possess pallets of nearly new equipment that had zero issues in function and was only decommissioned per security compliance requirements involving End Of Life equipment. Many informed consumers are now complaining about the forced hardware upgrade for Windows 11 but this EOL revenue technique has existed for decades given Payment Card Industry (P.C.I.) compliance.