I assume that you are asking about the .20 cal Sheridan C Silver Streak NOT the C9 Silver streak. (It's worth more.)
New in box: Excellent condition $185
Very Good $160
Good $120
This is just an estimate.
Like all firearms, it depends on conditiion, and to some extent location. I just bought one for $50 in poor shape, they can fetch $150+ in excellent condition.
The Crosman Model 120 is a single shot .22 Caliber pump action Rifle made between 1952-54. In excellent shap it would be worth between $95 - $120
In order to give a estimate of value I need to know the condition and model of the rifle. Let me know is it Excellent, Very good, good, fair, or in poor shape. re-post with that information and I'll try to help you.
in good shape, 200-250$.
it all depends on the shape and condition of the rifle if its mint condition you could get up to $20,000! If its in poor condition then it could go for $100
Made by Marlin and is a version of the Model 336. Probably 1950's-1960's. In excellent shape, can bring $200-$225. sales@countrygunsmith.net
$50, maybe less depending on how poor shape it is in.
Requires professional appraisal.
Go to a gunsmith
New $330 from Bass Pro Shop used about $200 in good shape.
Winchester model 100 (rifle) in 100% shape is worth $550.00 in the 308 caliber. Winchester model 100 (carbine) in 100% shape is worth $795.00 in 308 caliber. If you find a model 100 in the 284 caliber consider yourself lucky and buy it, dinosaur bones are easier to find.
It would be worth around $65 in Excellent shape.