Notice how quickly this conversation shifted from radio to DXing cell service! That says something.
Older technologies don't always disappear completely but they do leave the mainstream. Desktop computers, incandescent light bulbs, cassette tapes, CDs and AM & FM radios are the technology of the past. Notebooks, tablets, phablets, LED lighting, digital audio files, Pandora and other streaming Internet are the technology of the future. (Desktop computers obviously still play a role in business but for individuals not so much.)
Over the winter I put a bunch of old stuff on eBay. Open reel tape decks, cassette decks, outboard processors, SCSI CD drives, ZIP Drives, JAZ Drives, a Mini-Disc recorder, AM-FM receiver, film cameras, incandescent video lighting, etc. Most of it sold to the tune of about $2k so obviously there's a market for old stuff, but I'm not planning to open a record store anytime soon.