The barrel will be marked Stevens Pope.  There is a serial number range but I do not have access to it now.  The ones for the military were marked 22 Cal on the left side.  The commercial ones were not. 
Check the bore.  I am having mine relined because it was trash. 
The stock should be full length.

Price is based on condition and without pictures it is difficult to say.  I have seen ones go for $2800 to $3400 in very good condition at auction.