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.
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.