What you have is a perfect reader, in that you can't depreciate it's condition by handling it (and the price was right!).
ACG's usually have one good tale out of the four, and if you truly like the book, either for it's cover illus or a story, you could consider upgrading to a VG when available. This publisher's fare doesn't get huge coin, as compared to EC's and Atlas's, so they are very affordable.
Edit; I just looked at my copy; "Dunston's Fate" seemed to be the best story IMO.
A dollar! Awesome. Those AITU issues were great. Lots of undervalued stories. Congrats!