Hello George,
Welcome to Stamp Community site.

All 5 albums being Greek stamps I would look to see a stamp dealer near you or someone dealing in stamps to mail them to to have hem appraised and valued.
They might give you a better price if you know something about them yourself and sold them yoruself on
ebay or Delcampe worldwide auction sites.
If they are expensive stamps and also in very good condition then the better auction houses in Prestige Delcampe or some also in teh USA and Canada amd worldwide.
I myself am not familiar with Greece as a collecting country so have little idea of their value.
If you have some pictures we could look at them here and see if they are in a good condition or no. Old collections are sometimes damaged by the weather and pther elements and so very devalued.