If hammerless, it is likely your Remington SxS is either a "Model 1894" or a "Model 1900". Both are very similar.
They are sound guns, but not collectorsitems unlesshigher grade models with factory engraving and fancy wood. Depending upon condition, it might be worth anywhere from $200 to $1,000. You said yours is in fair condition, so probably on the lower end of these numbers. The action would have originally been case-colored.
Let us know the gauge, barrel length, serial #, % of remaining finish, etc. and a picture would help.
JERRY
