Things I don't want to go away..

Computer cases with place for  5.25 inch and 3.5 inch units, both internal and
front-facing.

CD-R, DVD-R media and the drives to read and write them.

Cassette tapes.

Motherboards with Floppy and IDE controllers.

Internet service providers that provide you with a public routable IP address and
lets you make connections with destination port 25 and set up reverse DNS without
you having to buy a business subscription at 10x the price.