I would run the comps first. I think a low-ball offer is anything greater than 10-15% depending on the amount of days on market. The agent also needs to take into account seller motivation. If it has been on the market 60 days you need to take into account if it has had a reduction too. 60 days isn't that long. If they aren't motivated there isn't a guarantee they will take it but if there are enough houses you are considering, eventually someone will.
The Reavis Group