Sure, but $200 on eBay will get you something along the lines of a Dell Latitude, with decent build quality, cost-optimized more than a flagship workstation-class laptop, but certainly not designed to squeeze out the last penny at the expense of reliability or repairability like the cheapest consumer models.

And if you buy a 5-year-old corporate laptop in very good condition with minimal visible wear on the keyboard and touchpad, it was likely only used as a desktop replacement connected to a dock, so unlikely to have suffered abuse not apparent from visual inspection alone.

If you're planning to use it as an actual laptop, price out a replacement battery before purchase, as battery capacity will degrade over time, even if the laptop is exclusively used on AC, so will always be something of a crapshoot.

Otherwise, I'd expect the rate of component failure to be no higher than for any other lightly-used laptop of similar vintage, which is low.

What makes you assume that the Raspberry Pi is using higher quality components?

Again, is that just a feeling, or do you have some data to actually show this. In my experience even old basic Acer laptops easily last more than 10 years, probably without the battery and married to the charger forever now, but they will work fine. But I don't go on the internet and tell everyone laptops last most than 10 years just because I know of a few Acers lasting that. Likewise, do you have any statistics on longevity of Raspberry Pis.