I am cheaper than the rest of you. If the car is drivable, I throw in a few old newspapers, go to my recycling center, get the car weighed, toss out the newspapers, get the car re-weighed, take my $0.17 check for the paper and a free, pretty accurate weight slip. Such a deal!
At the local recycling center here they leave a drop off area open all the time. You don't get paid after regular business hours but you can run across the scales 24/7 with a big digital readout right next to the scale.