Z80? That new? That Compaq has a keyboard! What's that?!!??
If you want a relic, I still have my MITS Altair 8800, 8080 processor with 256 bytes (yes, BYTES) of memory as delivered for $500. It's been upgraded to 12KB of static RAM, video card, serial and parallel card, etc. Keyboard? What was that? You had to find a surplus one of those and interface it to the Altair and write a program to read it. Same with interfacing to the monochrome video monitor. I bought a new Montgomery-Ward B&W TV on sale just for the purpose of ripping out everything that was TV and modifying the rest for the best composite input I could get. The only requirement for the TV other than price was that it had to include the schematic so that I knew what to rip out and what to keep.
Books like that for sale at such inflated prices makes me want to start offering all of my old "antique electronics" books and magazines on epay and see if I can get enough dinero to make a few house payments.
Dean