Trade Wheels — Sell

"Deal," Sal said. "But tell the guys in the sedan outside—if they scuff these on the way out, the trade is off."

The man reached into his coat and produced a velvet bag. He poured the contents onto the counter: four pristine, magnesium-alloy wheels from a prototype vehicle that officially never existed. They were lighter than air and worth more than the shop itself. "The past for the future," the man whispered. SELL TRADE WHEELS

What is the of the story? (Marketing, entertainment, or a personal project?) What type of car should be the "hero" of the story? Should the tone be gritty and mysterious or upbeat and fun ? "Deal," Sal said