I'm Jono, 30, grew up with MFM hard drives and 86/286/386, Amstrads and Acorns.
So you can pretty much guess what I collect.
I had a large collection around ten years ago, but constant pegging about my "junk" unfortunately led to it being dispersed.
Being older and having a greater appreciation for their rarity - I plan to build a collection which I will never part with (exception for museums) and document where possible. I love being able to look up a machine on the internet and find out heaps - so the more I can do to help I will.
When I was 15 I had two large boxes filled with MFM drives (count the ST225's!), now finding them is almost impossible.
Currently in my collection, only really 3 items:
IBM PC 5150 - all original and in pristine condition with twin floppies (and the spare faceplate), documentation etc
Toshiba T3200SX - 1Mb of RAM but still runs WIndows 3.1 as happy as it did new.
I removed an 8080 CPU board that the original owner had fitted (still in my possession) and fitted a SoundBlaster Pro for Wolfenstein 3D goodness.
Fountain Console - with about 10-15 game cartridges in original boxes.
(oh and a Compaq, not quite an antique yet, Pentium III on NT4 Workstation)
These are all in safe storage, however I plan to revive them soon, and hopefully by next weekend I will have more to add to this