As with all other things, a good value is relative.
I used to work at a consignment boutique where the customers were thrilled to pay $17 for a used blouse. I think that's outrageous, but if you're used to paying $65 for a blouse, $17 is cheap.
For the person paying $17 for a used blouse at the consignment boutique, $3.98 at Goodwill is a bargain.
For the person paying $1 or less for a blouse at other thrift shops, Goodwill isn't such a great bargain.
Because I have found other less-expensive sources for clothing and merchandise for my family, Goodwill is too high for my needs. I don't shop there, but since they are still in business and have a high turn-over of products, others are still finding good values there.