A few week ago, I scored a Fujitsu Futro S720 passively cooled mini PC (technically, it's a thin client) with an AMD GX-217GA processor, 4GB RAM and an 8GB mSATA SSD. All of that for paltry €14,03 — with free DHL shipping included.
I upgraded RAM to 8GB (€11,99) and a 128GB mSATA SSD SATA III (€17,99). And for a princely sum of €44,01, I've got myself a machine that easily qualifies for the title of the hardware bargain of the year. I'm using it as a Docker-based server that runs a bunch of containerized web applications.
I bought the machine from PIOSPARTSLAP.