I can only go by my experiences, but i would struggle to get that in the first month of parking. If, however the domain had expired, and had previously got good traffic, then this may be possible.
The other possibility would be if it is a high pay-per-click Poker domain. These can pay well over $1 a click.
I can only assume that someone may be trying to sell you a domain with these stats. Ask to see the screen shots, and also try and see where the traffic is coming from.