Only 300 made is a joke on what is often placed in for-sale ads.
Saying only 300 made is a stupid/silly as saying they only know of 1 in existence today.
Obviously they do not know much about how many are in existence today, and they do not know the correct name of that model "Panel truck" (not a "panel van", which could also be mistaken to mean a sedan delivery "van").
As usual, I am just being a jerk about trying to use correct/meaningful terms/names.
