Back when the Y2K thing was a thing all of these little VAXStation VLC's were being dumped on the market left and right. I had 15 of them at one time with an average acquisition price per unit of less than that of a Raspberry pi :-). Even built a 4 unit cluster for fun with a NetGear 4 port switch.

Easier to get RasPi's of course, and even easier to run multiple containers running simh to get the same experience. I can recommend playing around with a VAXCluster for while to get a feel for what a nice clustered computer command line felt like back in the 90's. There are still lessons to be learned for current developers of "cloud" systems.