One of the best is a Feinwerkbau Westinger & Altenburger. Biathlon Air Rifle Model P700 Aluminum. Average cost $2,480. It's an Olympic Match Rifle.
between $475 and $600
If you are serious about air rifle .177 competition then there are several to choose from (See the link below) But I would select one of the Feinwerkbau P700 models.
you will have to give a description of the condition of the rifle in order to get an estimate of value. Is it still working?
If you are talking about guns and rifles it would most likely be a Feinwerkbau 800X PCP Air Rifle. You can find it at the link below.http://www.pyramydair.com/s/m/Feinwerkbau_800X_PCP_Air_Rifle/2771
Each ROTC Unit can select their own choice of competition air rifles if they are in a match. You will find rifles made by Walther, Feinwerkbau and others. No one rifle is predominate
One of the best is a Feinwerkbau Westinger & Altenburger. Biathlon Air Rifle Model P700 Aluminum. Average cost $2,480. It's an Olympic Match Rifle. The best air rifles for target shooting are Olympic Biathlon match rifles.
It depends on the model. There are over 200 air rifles on the market. You can find anything from a Daisy Red Ryder for around $35 to a Feinwerkbau that will cost you over $3000.
Just What do you mean by "training air rifle"? Daisy and several other companies make match grade air rifles. like Feinwerkbau, Crosman and AirForce. Daisy also has a line "AVANTI" that are match grade air rifles. I suggest searching the WEB for the best results. See the link below.
The value of a benjamin sheridan 392pa 5.5mm 22cal air rifle is $185
When you say "Gun" do you mean Pistol or both Pistol and Rifle? The highest quality pellet guns are Olympic class Pre-Charged Pneumatic match pistols. (PCP's). An example would be a Feinwerkbau P44 Match Air Pistol. The cost for this pistol is $1765.95. The very best Match rifle is the Feinwerkbau 800 PCP Air Rifle at a cost of $3245.95. The support system to charge the rifle or the pistol will cost anywhere between $300 to $1,000. However is you want something a little less but Excellent, then there is a very large selection of pellet guns available that will cost you anywhere between $300 to $600.
I know of NO Co-roman air rifle. Please provide more details. Do you mean Crosman 180 air rifle?