The key you're missing is Amazon didn't have to spend that ~$25 in the first place.
I'm guessing your assumption of Amazon's out-of-pocket cost is the source of your insistence that Amazon is determined to restock and re-sale instead of throwaway. That mental model of how big retailers operate is incorrect.
The giant retailers like Amazon/Walmart/Target don't pay upfront for merchandise. Instead, they use a complicated "chargeback model". They just deduct customer returns from the ongoing rolling invoices "net 90" etc.
https://www.google.com/search?q=amazon+walmart+target+%22net...
So, Amazon doesn't really "lose money" for customer returns if they don't re-stock & resell. It's the manufacturers and sellers that take the financial hit. (Which would be the much lower ~$5 instead of $25.) The above chargeback model is why Amazon was so nonchalant about throwing away perfectly good items that were returned by customers. Amazon wasn't incentivized to bother trying to re-sell it. Instead of taking a risk with a tainted customer return, just mathematically deduct it from the next vendor's payment. No ~$25 wholesale cost needs to be "recovered" because Amazon never spent it.
>That's not how businesses operate.
It is (or was) how they operated. That isn't FUD. Canada, France, Germany did investigative reports with hidden cameras and GPS trackers to discover that billions in Amazon merchandise was being dump at landfills and/or burned at incinerators. (What Amazon euphemistically calls "energy recovery"). This includes lots of expensive items that were more than ~$4 such as new coffee machines. The public relations backlash at Amazon destroying so much product was so bad that France passed a new law targeted at Amazon to stop doing it: https://www.google.com/search?q=amazon+france+passes+new+law...
That's when Amazon started a more earnest "re-sale or donate" and reduce the destruction of customer returns.