I have quite a lot of old "thin ethernet" computer networking hardware, e.g.:-

Lots of 50 ohm coaxial cable (originally 100 meters, but in pieces now, some quite long pieces though)

Lots of 50 ohm BNC connectors, T pieces, terminators, etc.

One or two PC network cards with BNC connectors.

An Axis print server with BNC connector.

A hub with a BNC connector (and RJ45 connectors).

Free to a good home if anyone wants it, I'm near Ipswich, might be able to deliver in the area.