The tire companies must have produced as many of these novelty ashtrays as they did tires for your car. These can be found just about anywhere, anytime. They are typically "box lot" items at most auctions due to their relatively low value. There are a very few exceptions to this rule: Michelin Man Ashtrays, World's Fair Ashtrays and early (1920's & 1930's) ashtrays. But even the exceptional ones bring minuscule amounts of around $30.00. So when you come across advertising ashtrays such as these don't pull out your checkbook! If they come free or almost free you will be OK. These are boarder line trash it items. Most trays like this one sell for between $3-10.00. Good luck hunting and don't be awestruck when you run into these.