The 1894 could be priced about right if it is in nearly new condition, or a special grade.  

The prices on Model 12's vary all over the place depending on condition and grade.  

I haven't been able to find any really good references on the net for pricing antique firearms.  You can research the sites of dealers and get some idea of what they are asking, and look at the auction sites for some calibration, but it is very hard to pin down a good value this way.

You migth try this site -
[url]http://www.winchestercollector.org/[/url]

Post WWI '03's bring $600 to $3000.  

'03a3's are worth anywhere from $300 to $2000 or so.  I don't know if their market value is rising with their popularity for use in CMP Garand matches.

Try [url]http://www.jouster.com/[/url] for 1903 information, or at least a starting place.  

I found a fair bit of info by searching for "1903 rifle" and "1903 Springfield' in the Google search engine.  

I would also try the 03 forum at [url]talk.shooters.com[/url]. If you post questions at the Culver and Shooters site, you will probagbly find out who the 1903 guru's are immeditely.