Best thing to do is just look around at what's listed and put yours where you think it belongs compared to the others. Without pictures or more info, I'd say anywhere from 6k-15k. LS swaps or stroker motors help value, original drivetrain is fine though and some prefer that. If the paint is peeling, that definitely hurts the values as does clear coat since these were never cleared originally. I can tell you one thing that would help the value tremendously would be putting it back in stock rallies and 33s or 35s, not many people want big wheels on these things.
Yes, this.
Personally I don't think LS swaps help value at all, but they also do not seem to hurt in any way. Hey some guys are into it and to the right buyer it could be a plus. But I agree about the clear coat especially if its peeling, and DEFINITELY agree about the wheels. Brodozers do NOT attract buyers. Stock rallyes or at least period correct cool aftermarket wheels in good shape (hurricanes, etc) are good. People who want huge flashy wheels probably don't care much about a "good truck" they just want to drive around and show off their rims so I doubt they'd be willing to pay a decent price.
The more original and solid your truck is, maybe some
tasteful upgrades (slight lift, good sounding exhaust, etc) can help resale value, but generally any money dumped into a truck is not regained when you sell, personal preference is just that- personal. Personally I wouldn't touch a truck with digital gauges and a modern stereo cut into the dash and vintage air and bucket seats out of an escalade, but a lot of people do that stuff to their squares so obviously someone out there is into it.
Shortbed helps value a decent amount, but it doesn't make the truck into gold, not gonna be worth twice as much as a longbed or anything. Look online and see what comparable trucks are going for around you, it varies so much depending on where you are (heck there are some parts of the country where 2wd trucks are actually somehow more desirable than 4x4). I see dudes in the desert buying trucks for a few hundred bucks as a POS parts truck that would probably go for 5 grand listed as a super clean daily driver up here in the land of rust. I have no idea what the truck scene is like in Georgia, can't give you a straight answer from up here.