Vintage phones, typewriters, and electronics can all fetch high prices in the antique market. At The Old Phone Shop, Western Electric phones sell for hundreds of dollars. Do you have old computers lying around in the attic? Apple’s original Mac computer sells for around $100 to $300 on eBay—but has been known to sell for as much as $900,000. And don’t overlook the technology of the early aughts: A factory-sealed, first-generation iPhone sold at auction for a whopping $63,000.