curbstoner
 n.— «Wholesalers prefer the state would turn its effort instead to putting so-called “curbstoners” out of business. Those are unlicensed hobbyists who park collections of used cars in vacant lots along the roadside and sell them in defiance of the law.» —“Going for good deals on wheels” by Mark Albright St. Petersburg Times (Florida) Feb. 8, 1988. (source: Double-Tongued Dictionary)