My friend has 2000 unique per day and he earns less than 1$ per day. I, however, have about 300 unique per day and I earn 5-6$ per day
It also depends on the geo-position of your visitors. If you get 1k from USA you'll be paid a hell of a lot more than 1k from Botswana.
There are so many variables, no one can give a exact estimate of what you can make. I say probably from $0-100 a day, it depends on your niche, AdSense placement/optimization, geo-targeting, and how well your traffic converts for the advertisers.
This is low, I'm in the gaming niche and hitting around $3 per 6,000 impressions \ 60-70 clicks. Where is your traffic coming from?