Tired of these price shoppers and lowballers

Seriously, the amount of people calling lately just to "check prices" and then ghosting is driving me nuts. I’ve got three trucks sitting idle half the day because some new guy in a beat-up trailer is quoting prices that barely cover the tipping fees.

How are you guys finding actual contractors who need regular cans instead of these one-off residential headaches? I'm about ready to just park the trucks for a month.