Used 5"-6" lift
 

Hey guys, I spent 10 or so minutes looking around and didn't find what I was looking for, but if I missed something, sorry for posting about info that's already there.
What I need to know is, is what does a used trailmaster, bds, and superlift kit go for? the trailmaster 5, bds 5, and superlift 6. What would they be (just a general guess) if the seller actually took it off the truck, and what would it be if I took it off myself?

Reason I'm asking for all of the kits is that I found a jimmy possibly being parted out and the ad says 7 inches total lift. The person who posted the ad isn't the owner but is responsible for selling it, yet doesn't know which lift kit it is.. I figure it's obviously a combination of any two out of a 5-6", a body lift, or a 2" kit.
The seller said he'll contact the owner and find out what it is, so I'm just looking to have an idea of what they're worth so I can try to get it for less haha