Places to locate old Bose speakers are on large Web-based sales platforms, including eBay, Craigslist or Amazon. These sites allow users to search by category to find specific speakers.
To find a speaker on eBay or Amazon, navigate to the site's Speakers category. EBay has a specific Vintage Speakers category that you can further narrow down to the Bose brand.
Craigslist is a good resource for finding used electronics. There are usually many options for vintage speakers, including Bose, on its listings. However, Craigslist searches are limited by region. If there are no listings for the product nearby, look in more populous regions; some users are willing to negotiate additional shipping or travel costs to sell their products.