Value ojf 25 cal mab pistol?

Between 1921 and 1982, MAB made several pistol models in .25:

model A vest pocket pistol

model B vest pocket pistol

model E pocket pistol

model GZ pocket pistol (actually made under license by Spanish gunmaker Echasa, as MAB Espanola)

The value will depend on which model it is, which version of that model, and condition. Since 2010, the range for the above pistols is about $50 - $300.