I dont call a tire kicker anyone who is
1. Asking Questions about the Item
2. Offering Trades unless its something thats not even close to even up.
I call them a tire kicker when they say "whats your name and address I'd like to send money" my reply normally is where are you located so I can figure out shipping cost, or message them back and say cost plus shipping and never hear a word back.
Thats what I call a " Tire Kicker"