Interesting question. Which is worth more, small pattern which are really rare, but not much demand, or much more common big pattern that will fit many more cars, so more potential customers.
I don't know the answer.....
Doesn't really matter one way or the other. I believe the demand is about the same.
About the price, pick a price you feel comfortable with & start from there. You'll find out quickly if you're asking too much & if you weren't, does it really matter because you got what you wanted for them.