rbdesign brings up some good points. Fluctuating prices might not be the best thing. If you want to try it though, it might help to make it known that it's a "Grand Opening" kind of thing. For example, you could set up coupon codes for a discount or for free shipping, and advertise them on a blog for a limited time. That way, people may be more willing to take a chance on buying from you, but they will still see your real prices when they go to your shop.
Also, if all your prices are super super low, you might not be attracting the kind of customer who appreciates your talent and your hard work anyway. If your customer is really hard to please, you might not get good feedback no matter what you do. Hopefully that's a rare occurrence though!