Here a few better pictures of the kit. I think I'm going to ask $1,500 OBO for it. Does that seem reasonable?
I think it's reasonable to ask, but if it were me and I was trying to sell them, I'd take $700. Bass drum hoops and T rods are not original. The finish (typically for satin flame) looks rough. I'm even wondering if the drums have been re-finished.
I'm thinking that, unless Slingerland changed there source of satin flame wrap in the late '70s as it wasn't popular then, the finish on that set doesn't look like the regular blue or green (aqua) satin flames.
Here are a couple pics from google images.
The modern set has the wrap that the pattern looks more like yours.
(I could be wrong!)