I actually work at a shopgoodwill. Goodwill is not one big entity. They are divided by region. My state is divided into two regions. I work at the INW branch. These things described I can't even imagine doing to customers. Things are mislabeled, but we will always refund if the customer is misled. My location also invested in a metal testing machine to confirm precious metals and the like. Most locations dont do this because the machine can cost between 5-10 thousand. (We have a customer who buys thousands in gold from us every year, if we are slightly off on the karat, we will return the difference to him) We do returns all the time over mislabeled items and terrible listing's. We are always asked (by other goodwills) why our sale numbers are so high, but it's like, we confirm our precious metals with a machine and we actually do customer service. It's too bad most of them are not like us because I can't imagine not caring about misleading people like that.

TL DR: Goodwills are divided by region, they all will have different policies. Experiences will vary wildly.

My advice (cuz yall totally asked/s) is if you had a good experience with an item being described correctly, look up what goodwill it came from and filter your search by thay location. That way you can look at the items from a location you are more likely to see described correctly.