Joe V,

As you can see, there are many here willing to be helpful with advice/guidance and answer questions. It would be, however, most helpful in providing relevant and useful information if you could give a little background. Without that, the advice can be pretty meaningless or of no use whatsoever.

What exactly is your goal?
For example:
- Want to have backing tracks to .... jam along with for fun... maintain or improve improvising or melody playing skill... sing along with... as a guide to learning a song

What is your level of musical ability?
For example:
- Have a Masters in Music Composition and am struggling with writer's block
- Strum simple chords on a guitar and sing songs, nothing fancy or involved, just hobby fun stuff
- Played for 10 years, now wanting to move from shred metal to jazz
- Play really well, 20 years and counting, but know nothing of reading music or music theory

Keep in mind that everybody starts at the bottom... with no skill and no knowledge. Each person progresses at their own pace. Each person learns various things in various ways at various times.

Or maybe its just as simple as "Looking for a website to buy backing tracks". If that's the case....
I have no knowledge of any websites. I used BiaB to MAKE backing tracks.