I have a full set of 4in YJ lift springs They are Skyjacker Brand. They will need new bushing but i have a bushing kit to replace the old ones with(the bolts rusted to the steel sleeves in the bushings and had to cut them out)
The springs are in good shape. No idea on age. I was able to stuff 33's no problem and was able to get 35's to clear with a little fender trimming in the rear.They ride great not stiff at all but saggy either. Im going to 1 tons and different style leaf springs so i have no need for these anymore.
Asking 175 OBO
I have pics. Ill post them up later.