The listing, US 15¢ Windmills stamps +BONUS (Used) has ended.
These stamps were issued in 1980 to show typical windmills around the US. Each is removed from a letter.
I have several sets of these stamps, so the picture you see is representative of what you will receive. The colors will be just as bright, but as you'd expect, the cancellation will be more or less than what you see here.
And as a bonus, you'll get another 1980 5¢ stamp commemorating the 100th meeting of the American Philatelic Society. Absolutely FREE! (But also used and with the same caveat on varying cancellations)
So you're getting 4 definitives and 1 commemorative stamp. If you don't know those words, look them up. They are important in our chosen hobby.