Yeah it can be annoying and tiring dealing with a bunch of these tire kickers. Once in the blue, you get a decent person to deal with.
It's always best to list your items more than what you want to get in your pocket, because of this very reason. Even if you list something below value, you'll likely have a couple schmucks still asking if you can do better on the price. For example, if I'm okay with letting a video game go for $30, will list it at $40 since everyone messaging me asks if I could do a lower price. I then say yeah I can do $30 and usually will get someone to pick it up. If I list it at $30, every message will be asking if I could do a lower price.
To avoid scammers on expensive items, always agree to meet at a police station, where they usually have a buy/sell exchange zones. When I sold an extra PS5 I had, met the buyer at a police station. Otherwise, I had people asking for my address or asking me to meet them in a parking lot of their apartment building lmao.