Hello Brutuss,
Welcome and thanks for posting all the interesting photos. The images are small and somewhat dark so it's hard to see much detail. A regular computer scanner would make better images than a camera. However, you have quite the assortment of U.S. postal stationery - stamped envelopes, wrappers, postal card and postal reply cards.
Like I wrote before, it's hard to see the detail of any one cover, but you probably have a mix lot of covers in terms of value. Some are common and some are less common. The postal envelopes have a lot of variation - color shades, watermarks, envelope sizes and types and dies. Some of those factors are hard to see on a computer and best for an expert to see them in person.
There are other factors to take in consideration too such as the different combinations of stamps used on the envelopes, the postmarks, the history of the sender and receiver, any advertisements on cover, any letter contents if any, additional labels like the registered mail labels and the general condition of the cover. As to monetary value, you can ask ten different people and get ten different responses when it comes to covers. The covers could be worth as little as 25 cents each or could be worth $1, $5, $10, $20, $50 or more, but a lot of times that's only determined at time of transaction (i.e auction or sale). I don't see anything offhand that will make you rich, but I think if they had better photos, well written descriptions and placed for sale on
ebay at a resonable starting price some will do very well and some won't generate any interest at all. Good luck and ask more questions and show more covers if you got them!
Will