It really, really depends on what you need. Do you already data showing a gifted child and you just need a report? Do you suspect some hidden 2E issues? Are you looking to establish a relationship with an ed.psych for ongoing consulting or just get testing done? Does your child relate better to a man or woman, younger or older?
We used a local educational psychologist who does identification for two local school districts when they have a child who is on the cusp using CoGAT or NNAT. She also runs a private practice. We were able to get a WISC and WIAT for about $600, including two long reports, two hours of phone consultation regarding the reports and several other emails back and forth with follow up questions for placement.
If you have complex issues that you need testing to tease out the answers, then I suggest you find someone who is familiar with those issues. Aimee Yermish or Dr. Amend are great for 2E but if you don't need that kind of evaluation, that might be a long way to go for a lot of money that would be better spent on enrichment activities.
