I fear it's because there's no obvious answer to your question within the realm of analogue tape. What you're asking for is very specialist gear and will either be very expensive or very much "luck of the draw" for second hand stuff.
It won't be what you want to hear, but if you want "good sound at a good price" you're going to have to move in the direction of digital recording, either with a specific piece of hardware or DAW software on a computer.
If you want to stick with multitrack analogue, you'll have to resign your self to join the world of "enthusiasts".
Since my 8 track one inch recorder was sold almost ten years ago (for more than I paid for it despite it needing a new belt) I can't help you personally. My only suggestion is to see if you get more response in the Analogue forum here on HR.
Good luck whichever way you go.
The pessimist sees the glass as half empty. The optimist sees it as half full. The realist just drains the darn thing and gets a refill!
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