Can I get a single stamp here for my envelope and how much are they?

I don't think so. I used to get them at Meijer just up the street though all of the time.

I think they only sell books of stamps

Many people are saying yes but I tried a couple weeks ago to buy 1 single stamp and they said no

I know you can purchase a whole book of stamps but I don't think they sell single stamps. Your best option would probably be a convenience store or the post office. I believe postal stamps are $0.49.

Yes