What a nice, general, world-wide collection. And the stamps look as though they have been treated well. Nothing of great value stood out for me, but I only glanced through each page. I saw one or two stamps for which I would pay a dollar. In general terms, I think you could multiply the number of stamps by twenty cents and get a fair value for the lot. Keep in mind that someone who is looking for a particular stamp might be willing to pay more, but I saw nothing here that can't be found easily enough on
ebay. (The exception being the Vietnamese stamps perhaps.)