look for stuff like this.
http://chicago.craigslist.org/sox/pts/1725188815.html
"Im parting out my black 1991 nissan 240sx se hatchback, i have almost every aspect of a stock 240sx except some trunk paneling and the stereo, let me know whatever you need and Ill let you know if I have it. Text Preffered, i may not always be available to answer the phone. "
Ask about getting the shell, "after the part out" he might just want a couple hundos and to get it out of the way.
Also Theres s14's
http://chicago.craigslist.org/sox/pts/1717441097.html
"i have a 1995 nissan 240sx s14 shell/chassis with a clean title, it is rough needs alot of work there is no windows no paint no interior, but it does come with a widebody kit, 2 engines(ka24de),2 trans, full harness that came out of the car, misc interior, both front seats, i am cleaning out my nissan stuff i have about 8 boxes full of parts and you will need to bring a truck and trailer to pickup. This is 1500 obo this will be the only posting so when it is the car and all the parts are going to the scrapper, i am condisering trades for that parts and car. "
^Sounds like there's almost two cars in there.