1970 GMC 2500 "Super Custom"

[KAILUAZ]

Thanks to all who helped with the VIN on this truck, so far;
c=2wd
e= v-8
2=3/4 ton
34=fleetside
Z=Fremont plant
Z=1970

The badge's on the side say 2500 Super Custom. Anyone have any info on these models?
I looked at it today and it looks like original black paint with a few cancer spots scrapes etc. Frame looks solid, bed has wood floor all around. Looks like it has factory air/heat.
Any way I'm gonna call the guy and take a closer look, he's asking $3500 obo, what do you think about that,,, round about?

Thanks!