Check it out and see what the condition it's in. If it has a SG in it, it just adds value to it. Also, I'm good with the cone unit if that's what it has but if one side turns easy and the other side doesn't turn or goes in the opposite direction, chances are it's an open diff....but....I've seen them with a worn SG that did that and only knew it was a SG after opening things up. That's when you have to dig deeper to see if the worn SG is worth rebuilding. A cone unit can be machined to work well again but if the guts of it are hosed, then generally, it's junk. Some just keep on pouring the power to them thinking it'll start working again but they are only doing more damage to it. That also applies to the clutch units.
Anyways, if things are still good with good drums etc it just adds more value imo. There are many that want to ungrade to disc brakes so to them, good drums don't mean a hill of beans. Being it's a Satellite, it most likely has 10" drums and those are not expensive to replace. My area isn't exactly populated with Mopar folks so it might take some doings to get it sold locally but every now and then I run across someone that's building up something and shows up looking and if I had one (and I do) I'd start with 500 bucks at least. Like I said in another post, that stuff isn't just laying around here for the pickins these days.