I presume you're referring to a Rast-Gasser model 1895 8mm revolver. Price is very dependent on condition and markings, but they seem to be going for $200 to $500
My grandfather's pistol used in ww1
50 or so
$200
20-60 or so
These retail for about $85 new.
which Model are you asking about
no real value. depending on condition - $100 to $200
value is based on overall condition and gun model...............
50-125
75 USD
350.00 if in fair to good shape.
10-40 usd