The acceptable age range for one's dating prospects. This can be a stated range (i.e. "I tend to date women in their late-twenties, but my price range is 26-34."), or, it can be based on one's dating choices/behavior (i.e. "Damn dude, I didn't think 21 year olds were still in your price range.")
While I usually like younger women, she's 34, which is still in my price range.