Help a boy purchase Ice Skates

My girlfriend (31) loved ice skating as a kid. She apparently was pretty competitive and figure skated like 4-5x/week. She hasn’t done it in years. I want to get her a pair of ice skates for her birthday, but I’m guessing they are very particular. How much should I be spending? I don’t have a budget really, but don’t want to spend money just to spend money. Thoughts?! Thanks!