All dealers have to sell accordingly.
Ther is a set price on bows as to what the lowest prices should go.The more a proshop sells usually the price is lower,but not in all cases.
It's like gas,sorta like chris said but once you get into canada whew,look out your paying a fortune.
Some dealers determine how much they are gonna make on products by percentages or averages,some charge 10%,some 15%,some 20.
The dealer that charges more than 100 dollars more less than another for the same bow is due to what he makes or sells usually.