If that trek is Forest Green with pearl gold decals it's a 1994. I have one. I live in the Portland, OR Metro area which is a very "Hot" bike market and prices are high. That bike would sell for $225-$200 here, so the cost of a given bike will, in part, depend on where you live.

Yes the stem can be raised up or down and the handlebars can be rotated forward/rearward. Vintage Treks tend to hold their values better than some other brands.
[MENTION=305894]oddjob2[/MENTION] - is quite the expert on these Trek hybrids. Maybe he'll chime in.

Where are you located?