For small amounts, it's fine. If you get stiffed, then you're not out a whole lot. Just post a warning about the individual so others know about him when they do a quick search.
If you're selling a game or something, then paypal is not the wisest course.
Recommended reading: https://pinside.com/pinball/forum/topic/how-to-not-get-ripped-off-in-pinball-vids-guide/