It all depends on you, really!
As our techniques advance, we change prices. Some things drop as we progress because we deem them to not be our best.
So for implosions, our basic no frills, we charge $18. As they get more complex, time consuming, etc they grow. So I'd say evaluate your work. See where you think you are personally. Price your best work the highest. But don't necessarily worry what other people charge all the time. What works for you might not work for someone else.
I try to fall in the middle. Not put my prices so low that it seems insane, but not as high as others because I feel I will never sell. I'd rather sell 50 $10 pendants than only 5 $100 pendants. I want a bigger range in customers. But, that is just me.
