Just modify the appropriate value in the args section to be either 0 or 1. At smaller stores, the employees are usually familiar with the merchandise and capable of giving intelligent advice. They also sell old prints, Americana, antique and used books, maps, and prints. People have noted that the owners are knowledgeable about the value of their books and you'll have to hunt for bargains. You get the feeling that you could find anything at all there if you only looked long enough.
Coliseum is large, and has a wide selection.
I have not found the staff to be very helpful. Mon-Fri during daytime hours. They have a terrific poetry section. There are remainders downstairs. The basement is also where the posters and sports and arts etc.