Location matters.The guy at the 95/58 interstate does not need to be a discount seller to attract business. He is in a prime location with tons of traffic. His real estate cost maybe high. his drive off rate maybe high. He has to price accordingly.
The guy down the road does need to discount to attract business. Locals will gravitate to him. But intestate traffic will not. Interstate traffic needs the convenience the prime location provides.
There is no rip off just pure capitalism.