Needing value of these guns.

I am try to get the approximate value of these guns...I will be trying to sell all of them as a whole..They belonged to my deceased brother and just bring to many memories to me..
1. Remington Model 1100
12 GA. LH FULL CHOKE
FOR 2 3/4 INCH SHELLS
N915034V 30 inch barrel
REMINGTON ARMS CO. INC. ILION, NY
approx. 20 yrs old

2. WINCHESTER MODEL 1200
16 GA. FULL CHOKE
2 3/4 INCH CHAMBER
MADE IN USA
L525030 28 inch barrel
approx. 20 yrs old.

3. OLD JAPANESE CARBINE type-99
21 st Series
Kokura Arsenal
T99 Short Rifle
I think manf. 1911-1935


4. COMMANCHE III 357 MAGNUM REVOLVER
146087
MADE IN ARGENTINA
RSA ENT. INC. OCEAN, N.J.
LASSERRE SA AVELLANEDA ARGENTINA
not sure of age...maybe 5-10 yrs

Also have pics of guns if you need to see.