Don't waste time on that tyre kicker at the dealership.
tyre kicker
idiomA person who pretends to be interested in purchasing an item (especially a car), but who has no intention of buying it.
Origin
disputed originFrom the act of kicking the tyres of a car as part of the inspection.
The seller grew frustrated because every potential buyer who called was just another tyre kicker.
After spending hours detailing the vehicle's history, he realized the man was merely a tyre kicker with no genuine intent to finalize the purchase.