Question for those who crochet and sell

Since I started selling my finished products, I've found it hard to come up with a price. I have been surfing the web for weeks trying to find the right solution for me. So far I check to see what the item I've made is going for on ETSY, and what I think would be fair. While other times I take the cost of materials and multiply by 2. Although if I want to make profit from this I really need set prices. 

How do you figure your prices?