I work with a lot of scrap and scrappers. they did this at the local scrapyard, and indeed they stopped accepting anything from anyone without a city-issued bus

I work with a lot of scrap and scrappers. they did this at the local scrapyard, and indeed they stopped accepting anything from anyone without a city-issued business license. now the tweakers sell directly to scrappers with a business license, that take a 25-50% cut.