Many years ago, I spent a long time underappreciated at a work place. One of the few perks was getting to 'dispose of' (i.e. take home) each generation's computer hardware for about 10 people. Over the years I did indeed (literally) dispose of quite a bit of it sadly, not being aware of how much it would eventually be worth, in both financial and nostalgia/re-use value.
To my point. One of the items I kept aside for about 10 years was a fairly nice Tualatin system. Over time, it got parts-ed up, repurposing the case, PSU and expansion cards - but always, the mainboard+CPU+RAM combo was kept "around", moving from pile to pile across the years. Always kept in the back of my mind - 'one day I'll use that'.
Come 2020. The perfect time to revisit old hardware and systems, and I did indeed build a few. But do you think that Tualatin base system is findable, in any way shape or form? Oh hell no. Oh hell no. I've been idly and not-so-idly looking for months now, and come to the vague conclusion that it's either in a pocket dimension perhaps only accessible by tapping the correct bathroom tile to the rhythm of West End Girls by the Pet Shop Boys, or it's grown wings and IDSPISPOPD'd itself the hell out of my house.
Bonus conclusion: store computer parts better + tidier. A work-in-progress.