Hi carleroo, welcome!
You have blocks of 4, as they are called, different types of them.
The 2c is a Plate block of 4, (assuming corner) with the plate number printed in the selvedge (or selvage as US people would say). This is damaged by having a crease across the corner but may still be of interest because of the plate number. Not sure.
Oh, these are all of the Presidental series.
Next, an upper right corner block of four 5c.
And then just a block of four 30c with some selvage on bottom. Nice strong color on that one, at least I like that color.
Nickname for this series is Prexie series. or Prexies. I would lok on
ebay to see how people describe these, so then you would do the same so people searching would be more likely to find your stamps also when searching.
Do you have a Scott catalog or have access to a library that has them?
Sometimes people search for the catalogue number too.
This is harder for foreign stamps as, for example, people in Great Britain would most likely use Stanley Gibbons catalogue numbers when searching. So in this case, you would make sure to describe the stamps well, citing the series they are known as, the year of issue, the country and abbreviation of same (United States or USA or US). Don't use periods in your abbreviations as
ebay search engine (program) ignores them. So U.S.A. while correct in English spelling, will be very hard to find when searching unless you surround the whole within quotes when searching and not many people do that.
I ramble on. Sorry.