50-150 USD or so
Ranger 103-1 was made by Marlin and is the same gun as the Marlin Model 90. If you can get one for $150, I say buy it!. If the the gun is a shooter and in reasonable shape, should be worth at least $250.
The exact value of a Winchester model 120 Ranger 12 gauge shotgun with Winchoke is actually dependent upon a number of factors. Some of these factors would be the age and condition of the shotgun.
50-180
100-300 USD
If it's really a shotgun and a rifle, I have no idea what you have. Several variations of the Model 1300 and Model 1400 shotguns had the Ranger name added and we would need to know a little more about it to give an estimated value.
The model 120 ranger shotgun ranges in price from 90-170 dollars depending on the overall condition of the gun and a good bore.
100-300 USD
50-575 usd
Between 140-200 dollars for a shotgun having between 60%-90% of its original finish remaining.
about a grand
It's the same as a Stevens 520, value of $75-$150 depending on condition.
Your Winchester model 120 ranger shotgun will be valued at between 90-200 dollars depending on overall condition and a good bore.
The value of a Miroku model BC3000 12 gauge under and over shotgun would depend on a couple different factors. Most important of these factors would be the condition.