My source for prizes were Poets & Writer’s database of contests (and grants) and a newsletter put out by C. Hope Clark called Funds for Writers.
On the one occasion when I surfed the internet to find a contest, I had a nasty surprise. I signed up for International Book Awards, paying $69 via Paypal. Then I tried to send my work. Over the course of the next week, I tried around 5 different email addresses. I discovered that the company who’d taken my money was called JPX media with an address in LA. Naturally, they didn’t have a phone number.
After initiating a dispute with Paypal, I got my money back. But I never did receive an explanation or apology.
So your best sources are C. Hope Clark’s newsletter and Poet & Writer’s database. I’ve never had a problem with them, and I don’t think you would too.
Have a fabulous week!