I went through something similar a couple of years ago! Back in the day I had an A1200, once I started my journey down memory lane I've ended up with 2 x A500+, 3 x A500 an A1200 and an A2000, as well as a couple ram expansions, an external FDD and a HDD (same as yours IIRC) for the A500/+, a few ram cards and a HDD card for the A2000 and the A1200 got a CF card and a new accelerator card. Most of them were spares/repair, both A500+ had pretty bad battery damage but I got them working, one of the A500 was smashed to pieces in transit so became a donor. I ended up buying the joysticks I used to use and tracked down a few of the games I used to play.
A few parts got the peroxide treatment, I was planning on doing all of the plastics but I lost interest and everything got put away, there's bits and pieces all over the house, I'll get back into it some day!