A lot of people, especially those who produce few if any clutches, will tell you to price them as to what you think they are worth. This is poor advice. You should price them as to what the market thinks they are worth. Any higher and you'll never sell them. The market will pay a premium for higher quality examples and good reputations. The problem is it seems like almost everyone feels their snakes fall into this category.
A successful seller is able to objectively assess the market value of their animals without factoring their personal feelings into it. As you gain experience selling, what you think they are worth will be based on your ability to read the market so the two will become indiscernable. Look at comparables for your local area and see how it matches up to your prices and quality. It may be that your prices are too high or it may be your prices were spot on but it was just an off day at the show.