I bought this very cheaply as a reference model for an FPGA recreation. However, I don't have time for that and other people have already done it. 

I thought I might strip the components so the PCB could be recorded for posterity and reproduction if required, but someone has already done that too.

Could I at least test that it works? It has no PSU, disk or keyboard, but the OS is in ROM so it should boot up with some kind of display. I could later buy a disk and a PC-to-ST keyboard translator device.

The board had been used for testing DRAM modules, so the SIMM sockets are sitting in turned-pin strips so they could be easily replaced when they wore out. That's not going to be very reliable so I shall have to restore it with new SIMM sockets.