Sagging Back End

Hey guys I'm new to the toyota world from the jeep world finally had a wake up call after the 3rd transmission rebuild. I just picked up a 1992 4runner with a lot of KMs on it and all the classic back tailgate/fender/bumper rust but it runs like a dream. My question in relation to suspension is the back end looks saggy.. I've noticed it in a lot of older 4runners. Is it just me? or is it a normal thing for these old girls to start sagging in the rear end? the front end fenders suspension etc etc is fairly fresh due to a fender bender that the old owner claimed on insurance. hence the name the mullet "business up front party in the back." If anyone knows the solution to this suspension situation or if you can just reassure that I'm just crazy please let me know. Thanks! I've uploaded a picture if that helps.

 

Coils are worn out. It happens. Just get you a new set of coils and shocks. Just figure out if you going to lift it get extended coils and how much wait your going to carry.

 

thank you!