Scott, sorry to see that you're selling.What are you looking for next?
I'd think that KBB is a good starting place, but check out what other models similar to yours in our area are going for.
Think of if you were a buyer looking for your truck, you'd compare as many models in our region as possible. As for the mods, they add some incentive, but mostly they're just curb appeal.
Ideally, you want to find someone that wants a truck outfitted like yours. Advertise well.