Where can i find "low-priced" German Shepherd Puppies for sale in MA, or Online?

I want to buy my 2 year old son a puppie since our dog recently past... i dont have much money though, but it breaks my heart to see him sad an bord... He lost his friend. Does anyone know where to find a Low-priced G.S Puppie online? or in or around the MASS area? Plz Help. Thanks alot.