No way we can answer your question without having examined the revolver. Gerstenberger and Eberwein produced an inexpensive line of small caliber handguns and blank guns. Importation to the US stopped with the 1968 Gun Control Act. These are not noted as being extremely high quality firearms. Yours should be examined by a competent gunsmith before firing.
DO YOU HAVE A PICTURE, ? As per the offical Gun Digest book of "GUNS & PRICES" 2007 edition, GERSTENBERGER & EBERWEIN GUSSENSTADT, GERMANY " A series of poor-quality revolvers sold in the U.S.A. before 1968. .22 and .32 calibers with 2.25" barrels, and a six shot cylinder VERY GOOD $125.00 GOOD $ 70.00 FAIR $50.00 POOR $25.00 I know somebody that has one too!
$25 or so
25-50
50 or so
value depends on overall condition...........
Less than 100 USD
10-100 USD or so
50-100 or so
There are too many variables to give you an answer.
25-1500 usd
100