The basic designs may be similar to the way they were 20, 30, 40+ years ago, but materials, manufacturing and engineering have become incrementally better each year.
Today there are manufacturers that sell direct-to-consumer and will ship gear to you for 30 day trials. Their entire business model is built around that. There are also retailers like Audio Advise or Crutchfield that have similar models.
If you're looking to purchase used and you're in a more remote area, you can just purchase gear from here and other similar sites, then sell off what you don't want.