: Both their physical stores and online shop are well-regarded for their "spoken word" sections. Local and Alternative Sources
: Specializes in collections and rare items, often listing stock from independent rare book dealers.
: Large travel centers like Love's or Pilot Flying J are famous for stocking audiobooks on CD, often featuring a rental/exchange program for long-distance drivers.
If you are hunting for older titles or looking to save money, used marketplaces are your best bet: