Quakertown Market, known to the locals as Q-Mart, is open Fridays, Saturdays and Sundays. It is a huge building, like an old barn, broken down in to individual business stalls, offering a huge variety of stores, services and food.
Highlights not to be missed is Fredericks Meats for Amish style meats, the Italian Deli for real Italian delights, including some great canolis, the CD store with new and great priced used CD, and the pet store, with lots of reptiles, fish and birds and the pastery shop with the cherry/cheese pastries.
Summer there is an outdoor fleamarket, with a lot of basement, attic and garage stuff at cheap prices.
This business has been around for a long time. You can get local produce seasonally. There is plenty of parking.