The best source of reclaimed wood can vary depending on your location and the type of wood you are looking for. However, here are some common sources that you can consider:

1. Demolition Sites: Look for buildings that are being renovated or demolished, as these can be a great source of reclaimed wood. You can often find old barn wood, flooring, beams, and other types of wood that have been salvaged from the site.
2. Salvage Yards: There are many salvage yards that specialize in reclaimed wood. They can have a wide variety of wood types, including rare and hard-to-find woods. You can often find old lumber, flooring, and other types of wood at these locations.
3. Online Marketplaces: There are many online marketplaces, such as Etsy and eBay, that offer reclaimed wood for sale. You can find a variety of wood types, including old barn wood, pallet wood, and other types of wood.
4. Woodworking Shops: Many woodworking shops use reclaimed wood in their projects and may have some scraps or leftover pieces that they are willing to sell. You can often find a variety of wood types at these locations.
5. Freecycle and Craigslist: Freecycle and Craigslist are online platforms where people give away or sell items they no longer need. You can often find free or low-cost reclaimed wood on these sites.

Remember to always ask about the wood’s history and make sure it has been properly processed to remove any potential contaminants before using it for your projects.