Gary, to the uninformed buyer, Z28 emblems ads at least 25 percent to the price of the car. Sometimes a LOT more!
I'm always amazed by the number of "newbies" that come onto these sites stating they just bought a numbers matching xxx (Z28, L78, L89, etc...) and NOW they want to know what we think about the trim tag, engine suffix, VIN stamp, etc...
And then they get P!$$ED off at US because we tell them they got ripped off and we never hear from them again.
In this day and age of instant information, people that buy cars without due diligence deserve what they get.
Ed