Well I'll give you $500 for the 3 stamps on page 2 right now!
If you put them on
ebay, and they're in as good shape as they appear, you'll likely get $1500-$2000 at least. But these 3 stamps are the 'gems' of what you've posted so far - and of any 'avid' US collection. Nothing else so far comes close in value - and likely won't. But again, one never knows - needs expert examination - up close. If all you want to do is sell everything, an auction house is an easy way to go...