There are several ways to find collectible cars for sale, and the best method depends on your specific needs and preferences. Here are some options to consider:

1. Online Auctions: Online auction sites like eBay Motors, Bring a Trailer, and Hemmings Auctions are great places to find collectible cars for sale. These sites allow you to search for specific makes and models, and you can often find rare and unique vehicles that are difficult to find elsewhere.

2. Classified Ads: Classified ad websites like Craigslist and Autotrader are also good places to find collectible cars for sale. You can search for specific makes and models, and you can often find local listings that are convenient to view in person.

3. Car Shows and Events: Attending car shows and events is a great way to connect with other collectors and find cars for sale. Many car shows have a designated area for cars that are for sale, and you can often find rare and unique vehicles that are not listed online.

4. Auction Houses: Auction houses like RM Sotheby’s and Bonhams specialize in selling high-end collectible cars. These auctions are often held in person, but you can also bid online if you are unable to attend in person.

5. Private Collectors: If you know other collectors in your area, they may be able to help you find collectible cars for sale. Many collectors prefer to sell their cars privately rather than through a dealer or auction house, so networking with other collectors can be a valuable resource.

Overall, the best way to find collectible cars for sale is to use a combination of these methods. By searching online, attending events, and networking with other collectors, you can increase your chances of finding the perfect car for your collection.