On offer is a Datalab DL905 Transient Recorder. Basically it turns an analogue oscilloscope into a very low performance DSO. I'm attaching a description of it from 1972 when it was released. This one did work last time I tried to use it, but that was probably 30 years ago. Any modern DSO, even a pocket one from aliexpress, would outperform it, so it is probably only of interest for historical or parts value.
It is heavy, so ideally you would pick it up in Canberra, Australia. Otherwise you would have to figure out how to get it to you and pay any costs.
Here is one in a museum:
https://collection.sciencemuseumgroup.org.uk/objects/co423984/datalab-transient-recorder-transient-recorderChris