Buying and cleaning used furniture

[RealLifeMama]

So, I have been looking and looking on fb marketplace for a used sectional to provide us with a little more seating.
Typically, when a decent one is listed in my price range from a pet free, smoke free home, it is gone super fast.
Today, I happened upon one that was just listed, and they were willing to deliver, so I jumped on it and got it.

Now, I am feeling a bit squeamish. It is microfiber and it has a lot of dark spots on the corners and a few spots on a few of the cushions. I figure I can toss some pillows and a couple throws on it, but the fact that it came from a complete stranger has me feeling a little regretful now. Especially as it is microfiber, and people tend to run their hands all over it all the time, KWIM?

Have any of you ever bought second (or third, or who knows how many) hand furniture from someone you don't know?
Most of our furniture, even at our age, has been second hand, but always someone that we knew.
Am I being a big germaphobe? (maybe it is covid that has me a little wary?)

How would you best clean it so it feels more like "mine"?