100% stock, i'd say around 800-1000 is a good asking price. most of the ones i've seen fetch any more than that have delrin bushings/shocks/springs/exhaust/halfshafts/diff covers...the works.
hell i couldnt sell mine for nothing so i just sold the center section and the axles, i got everything else make offer anyone please LOL. it in my way everyday fixing to bring it to my buddy with a used all stang junk yard to give me some credit for some parts later one, he dont want to by it .
There are alot around that are modded and have been for sale for about 3-6 months for around $700. The easiest way to get rid of it is find someone that wants to swap their SRA for your IRS. That is how my buddy got rid of his.