Thanks to Sheldon's site I found this quickly...
http://www.sheldonbrown.com/bridgest...ne-400psd.html
If it was my size & I wanted an old steel bike I'd certainly be interested. I'd guess you should get $1 or $2 hundred easily. Maybe more, I'm not an expert.
If it's *your* size, keep it if you have any thought of ever riding a bicycle. These old alloy-steel bikes are renowned for being very-nearly as nice in some respects, better in others, as very expensive new bikes but at a fraction of the price.
You could post in the 'Classic & Vintage' forum. It's maybe not modern enough for the 'Road' forum though it's a road bike.
-Rich