Amaterasu

this is my large painting for the artshow/auction at otakon. It depicts the shinto sun goddess Amaterasu. The painting is 11x17 and will be framed in an 18x24 fram with a 3in matt. I'm very torn on how to price it. If I start it low I run the risk of it selling for that price... but if gets a lot of bids on it'll go to the final auction and people there seem to get into some buying frenzy and those pieces go through the roof.... what to do what to do..... I'd really be sad to sell this for less than 50$