Successfully pricing your work really depends on several things totally separate from your turning abilities.
First is who your customers are. High-end art galleries have different clientele than low-end, just as county fairs have different ones than wine festivals, or music festivals. Art shows vary considerably as well. Also, specific venues will draw people looking for different styles (contemporary, traditional, museum, functional, etc.).
Second is will these customers have spendable money. A small church 'country fair' in the right location will probably have more real buyers than a large 'art festival' located in metropolitan inner city, especially today. Galleries can be a little harder to judge, as you've got to look at tourist potential as well.
Another issue is you've got to decide on what you want to accomplish. If you're looking to make a considerable percentage of your income from turning, you should develop a business plan that has strategic goals (making a 'name' for yourself, developing skills, developing an 'image', etc.) and tactical ones (sales goals, numbers and kinds of venues yearly, etc.). If you're looking to keep your home from overflowing with pieces, you can sell at next to nothing.
Then there's the old business axiom that the right price is the one that a both sides will accept. It's not what I might want to sell something at, it's the one that someone will actually buy the piece at. My wife and I do a considerable amount of art, craft, wine, music and whatever shows (even did an antique auto show). If I've the time and an upcoming show is very different from the last one, I may tweak my prices a bit, but not by much. While she only sells at shows, I've a few other venues that have worked well over the years.
Last comment is that I've had two of my galleries close in the past year and sales have really slowed at shows as well. It's very hard to set a selling price when you've no buyers at all, and I won't set one below cost or have 'sale pricing'. The economy will get better though, just have to be patient.