a 92 4dr EG would sell for something between $1500-$2500 at most i would say. if you look hard enough (and have the patience) there actually are civics/crx's (88-91) that are rust free and the price point is less than what you would get for your 4dr if you sold it.
example:
$800 rust free
http://www.vancouvercivics.com/forum....php?tid=95858
a little inspiration if you plan on keeping your sedan:
http://www.vancouvercivics.com/forum....php?tid=95211
in my opinion, choose the body type and year you like the most and start from there.