Out of nursing for 2 yrs/interview soon/wages??

I have a job interview next week, and I have no idea what to ask for as far as compensation goes. I have been out of nursing for 2 years, but am looking to work per diem days on a cardiac/tele unit. Salary.com says the 25th percentile salary for my area is $29/hr. It seems awfully high to me (I'm used to working for $17-19/hr!). Should I go for it and ask for $29/hr. or see what they offer me first?