I'd Like To Sell My USA Stamp Collection

Hello, I'd like to sell my USA 1940 - 70s stamp collection. I need your opinion. Should I sell my collection all at once or separately? In which case I will get more "profit"? How much $ I might get for the whole collection? There are 60 pages, Most stamps are Mint - Hinged.

I've uploaded all the pictures to dropbox / 60 Images: https://www.dropbox.com/sh/g6vcsn2m...YQRJCla?dl=0

Perhaps the first thing to do is to add up the face value of the mint, and take, say, 40% of that, which is what you might achieve at best. Personally, I'd sell en bloc on ebay. I presume that you can link to Dropbox from the text of your ebay sale, in which case I should do that, with the better pages used as the twelve pictures that ebay allows at the head of the listing. I'm afraid you aren't going to be rich!

40% *** Edited by Staff - Please Review the rules that you agreed to when you registered. *** that's a lot of money.. oh well..

Thank you for your answer

Sorry! Common, modern stamps really do sell for next to nothing.

What is really mind boggling is I see this on other stamps too even the ones posted online from philatelic site.