This is a good shop to go for the back issues that you can't find. Comic Book Heaven often has a good assortment on hand, for a reasonable price. However, the staff are nothing to write home about. Every time I hear "can I help you find something" it always has this tone of "buy something or get out." I have seen people in there who chat up the staff, and I can only conclude that they are either much more frequent customers, or a personal friends. There are certainly friendlier places to shop, but if you can't find it online, you might be able to find it here. Of course, there isn't a lot of room in this place, but that just means it's wall to wall comics!