Problem
Courtney's car has balding tires. Sam owns a hoagie shop on the outskirts of town. Sam does not customarily sell tires, but he has a few new tires that he was given by his brother Stan. Sam keeps the tires in the back of the hoagie shop, hoping to sell them to one day some hapless motorist. Courtney comes in one day with a flat tire on her Peugot station wagon and buys a replacement tire from Sam. Is Sam a merchant in this tire purchase, according to the UCC?