(I know, a year late...)
What Mike meant is that Goodwill has been consolidating their used computer business in specialty stores called "ComputerWorks". They are still Goodwill. But what they do is take all the computer donations from an entire city and send them to one single store which is the Goodwill Computerworks store. The the Computerworks store crushes everything of any interest and puts out a little bit of PC crap at prices picked off of Ebay, so you might as well just have shopped at Ebay in the first place.
That's the way it is in Austin and San Antonio Texas now. Mike's in Houston so I imagine Houston is the same way as well. I wonder if Goodwill is organized by state. The Computerworks stores might not be nationwide, or might be confined to large cities.
The sad thing is that when Goodwill first did this, they had great Mac stuff. I got a bunch of Daystar cards and a 9150 and a couple of SE/30s and even a few Radius Thunder IV GX cards at Goodwill. Of course, the 68K donation were also more common back in that time frame.
And they had boxes of old Mac parts/cards/logic boards.
Now there's never anything Mac out except "recent" models, G4 and newer. I'm sure they still must get some donations of older material, but none of it is available and there's no way to get a look in the huge space behind the store.