3. An HP LaserJet 5MP printer from 1995 with a parallel-port connector.
StarTech sells a $42 PCIe card with a parallel port and two
serial ports. If you're getting a desktop, this might be your
preferred path.
Two other options:
The 5MP has an expansion slot where you can put a network
interface. HP J2552-60001 is the part number. Refurbs of these
sell for about $75, which is about half the cost of a new laser
printer which will have a network port, duplex, and be about 8x
faster.
StarTech also makes a $75 parallel printer network server, which
is probably more available than the internal card, and can work
on other parallel interface printers.