I based my pricing on the templates available at 3 GUI sites. Those 3 sites have been around a lot longer than me so if anything i felt i was pushing the envelope a little.

Template pricing is typically a fraction of the price for a custom project. With a custom project all labor & overhead is covered by one client. With a template i can resell it for a small percentage of what it cost to generate and hopefully recover the time & overhead investment and then profit from it.