What do you think it's worth

[72 Cheyenne K20]

I found this while searching the internet. Ad says it is: 1969, targetmaster 350, 4 spd w/granny gear, new tires, rockwell t-case, 456 gears, front and rear heat. Also says custom built. I haven't called the guy yet, but I wanted to get opinions on wheather it looks custom built professional or I have a case of beer and a free weekend custom built . I haven't seen one that looks like so I have no clue. almost forgot, it's a K20.

Thanks, Scott