Blue Book of Gun Values
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It depends on the condition and whether it has the markings for a pistol used by the French military in WWI.
In general, these and other Eibar region "Ruby-type" pistols currently (late 2010) sell for about $100-$300. Beistigui Hermanos (Brothers) was a well-known firearms manufacturer, but in the US few people collect Spanish handguns.
(Eibar is a city in the Basque region of Spain, an area long known for firearms manufacturing. Dozens of small Eibar-area firearms manufacturers made almost a million Ruby-type automatics for the French military in WWI, most in .32 ACP / 7.65mm. Most of these companies went out of business by the end of the Spanish Civil War in the 1930s.)
$75-$150
what model pistol ????
German made.
Impossible to answer without knowing name of manufacturer.
about 350 or so
Take it to a gunsmith and ask for help
25-100
It is a type of pistol that was created by John Browning in 1911. The standard US Army 45 caliber automatic pistol was a Model 1911.
50-400
Made in Spain
100-300 USD or so
Ask a gunsmith for help