Any Knowledgable stamp collectors out there?

Okay, I have a box of over 800 stamps from germany mainly, along with iceland, greece, europe, the USA and a few asia. all stamps have been well preserved, and I have a few sheets of hitler stamps, and then a envelope of post or pre inflation era germany stamps. There are also old pre stamped envelopes from the US and pre stamped postcards, all unused.Some are postmarked stamps, all from the 1920's and up.I have tried researching the stamps online,but few sites have pics of worthwhile collectible stamps. So am just wondering what I should do with them?