I grew up in the NYC area and moved to Virginia in 1999--which is when I started driving back and forth regularly. The Delaware I-95 toll was $1.25 with E-ZPass back then, $2.00 cash. They eventually eliminated the E-ZPass discount and raised it to $4 over the years.
The $5 Maryland toll going northbound on 95 used to be $2, IIRC.