I recently purchased a mint 1920 for $1000. Almost the same pistol except for the grip safety, and the year.
Check here for some price ideas. Now these are Retail:
http://www.simpsonltd.com/index.php?...fdfdbebfdb1f95
Yes, that firing pin doesn't not like to dry fire. Either get a snap cap, or... as you close the breech, as the bolt is about 3 -8 inch from closed you'll feel a slight catch. At that point squeeze the trigger and the breech will close without cocking the pistol.
FN