This is from a gun collection, part of an estate with which I am helping a friend.  Basically, I am trying to establish a fair market value for each item.  That whole story is in another thread, if you are interested:

www.ar15.com/forums/topic.html?b=1&f=5&t=216974&w=myTopicPop

This handgun is decribed by the owner's family as:

Remington, Model 95, Type III, Blue, Double Derringer, .41 Short, 3" Double Barrel, Manufactured between 1910 and 1935. "Remington Arms -- U.M.C.CO.ILION,N.Y." on top of barrel, Serial # L96XXX

I actually have one of these little .41 rimfire Remingtons - a family heirloom that was passed down to me years ago - so I am somewhat familiar with the firearms, if not their value (I never considered selling mine...).  

My most current copy of the Blue Book describes this as "OVER AND UNDER DERRINGER - Type Four."  (I believe the family was incorrect in calling it a "Type III")  It places the value at $500 for 80%, $425 for 70%, $375 for 60%, $325 for 50%, etc. As you can see from the pictures below this blued model is in fair condition with a good deal of finish wear.  It does not have a box or any papers.  I am no good at assessing percentages, so I would appreciate any advice on how to evaluate/price this firearm fairly. I would prefer to avoid the hassle and expense of having these firearms professionally appraised, but I would like to be in the right ballpark when I establish the values.

As it is, I am thinking $375.  Does that sound reasonable, or am I way off base?