I have sold and bought off of etsy. I love that site! I was nervous when I posted my item but once it was done, I felt great! I'm sure your items won't fall apart, haha. I have also sold things through Facebook. I just realized that customer service is important. I sent three hats to a customer one time and I was supposed to send four. When I sent her the fourth hat, I included a little extra. She was more than happy and has ordered more since. People know that you are human. The only tricky part I find is the shipping. It is so much more expensive in Canada! I find it hard to compete sometimes with other sellers because of it.
As for the cost of your items, I would pick a middle ground. Don't be the cheapest because people will think your item is cheap, and you will lose out on money. Don't be the most expensive because people will go somewhere else.
I crochet items. What I did was I went to a local photographer and offered a couple hats for newborn photos for free. I just gave them to them. Through them, I have received so many orders!