(FORTUNE Small Business) – A Bobblehead Doll of Arnold Schwarzenegger was just another slow-selling gag gift--until its makers got sued. Now the $19.99 doll, clad in a business suit and toting a rifle, is selling out, and copies have been offered on eBay for as much as $49.99. Oak Productions, a firm based in Santa Monica, Calif., that licenses the California governor's publicity rights, filed suit accusing the maker of the Arnold bobblehead of illegally expropriating his image. The defendant, a six-person firm called Ohio Discount Merchandise, says the First Amendment protects its right to satirize a sitting politician, including one who happens to be a Hollywood star. The firm's owners, Todd and Toby Bosley, have also responded with a new product: a T-shirt inscribed stop arnold: bobbleheads have rights too! --CARLYE ADLER