What is the value of a model 370 youth 20 gauge?
Remington has never made a model 370, so I believe you mean a
model 870 (which has been the Remington slide action shotgun since
1950). There are other markings on the gun to identify its design
within the 870 series. Examples are Express, Wingmaster,
Lightweight, Special Purpose, etc. Other considerations include the
presence, or absence, of removable choke tubes, finish, vent rib,
etc. Without this info, no value can even be guessed. The 870 was a
Remington pump gun. Winchester made singles in 12 ga., 16 ga., 20
ga., 28 ga., and .410 bore that were Model 37, Model 370, and Model
37A. Model 37's were the oldest, followed by the Model 370. The
Model 37A's picked up the serial numbers where the 370 ended. The
Model 370's were manufactured in the late 60's to the late 70's.
Most of the Winchester 370's I have seen run in a condition range
from $115.00 low end to $250.00 high end.