Not too long ago, I registered and paid for a membership with Pennwriters.org.
This has saved me the same amount on an upcoming writers conference in Pittsburgh, PA in May. I'm also attending a pre-conference seminar the day before the conference begins.
This will be my first writing conference I will have attended. I'm looking forward to it, and plan to have my novel's first draft completed and a query letter and synopsis ready should I get the chance to perform an elevator pitch.