Can you tell me the value to my 1980 Mustang

The body needs work, it has many dings, scratches, a broken rear left light, a couple of small dents & someone painted a black handlebar type mustache, about 2 feet long, one on the front hood & one on the trunk hood.  The outside is white with all red interior & has a sun roof & bucket seats & is an automatic.  The inside  is very rough, rips in the upholstery, cracks in the dash, a big hole in the dashboad where the radio was taken out & overall very dirty & dusty.  It has been sitting on the street for the last 10 years, baking in the hot Phoenix sun.  The car drives OK but I don't drive it much because I have a newer car to drive.  It starts up right away, the transmission works good &  it aways passes emission the 1st time without having to do anything to it.  The last tuneup was about 8 years ago but since I never drive it, I don't do any maintenance on it. The last time I drove it was about 1+ years ago to go to emission.  The aircondition works ok, brakes ok but they need to be replaced, I don't notice any oil leaks, no smoke from the exhaust that I can see & the oil & transmission & break fluids, etc., never shows the level is going down or needs to be added to.  The shocks do need to be replaced?   I'm used to driving a 2000 Chevy Malibu so when I drive the Ford, which is very low to the ground, I feel every bump & crack in the road so shocks are probably needed & new tires.   I can't think of anything else, sorry,  no pics at this time.  I can add them later if necessary.  If you need more info, you can email me at barbaragreer44@yahoo.com.  Thank you very much for your help.