None of the above
I would prefer to get my bonsai material from my own back yard, but in real life, that ain't happening. Next to that, I would prefer to get my bonsai material next door, no drive and easy to transport.
That's the real world.
In all seriousness, where I prefer to get my material has nothing to do with where I do, I buy for quality and take it where I can find it.
By your title, I assume you think my recent poll was biased, sorry to hear that....