Serious collectors of topographical views tend to eventually turn to the Real Photo postcards as their desired card type. Although they are generally more expensive they are extra special finds to may collectors, as they show buildings, homes, people and sometimes even towns that no longer exist. There were also many local or itinerant photographers that would take photographs of prominent buildings and homes in an area. They would then either reproduce these images themselves or they might sell the negatives to the local druggist, or store owners who would then reproduce the cards and sell them in their stores. The images can be enlarged and even framed still showing great detail.
Some collectors even collect postmarks from ships - it is all quite an interesting subject.
Any other large purchases can be negotiated.