I, restarted my audio journey 10 years ago, when I finally had some money to spend on a decent stereo. I found Audiogon and it’s marketplace, as well as US Audio Market.
I might have been lucky, but I have had good experiences with all my transactions.
Many sellers allowed me to audition the equipment before payment. Many were very interested in sharing knowledge/opinions. Some became friends.
So, if you are feeling hesitant, and I don’t blame you, try reaching out to sellers. If you can’t demo the equipment, at least call them and speak with them. If you know people, then you can get an idea of whether to trust them or not.(-Kinda like ’Spidey Sense’).
If this still sounds too dicey for you, then purchase used from established dealers like Music Room or Audioconnection, etc.
Bob