How much?
I gave them $20 ($10/each) and told them to get a good lunch. My furniture was about $2k. Took them about 30min to unload, place it, and trash the cardboard. I know it's not a lot for what they do, but at least it's something. I even tip the gas attendents $1 when they wash my windshields. I tip the hard workers out there, but never give money to the onramp/offramp beggers. They get extra loaves of bread I get from Franz bakery outlets.