We had this same problem! A good friend who is a real estate agent said that for example when they give you a $30,000 price gap (like 400,000 to 430,000) they are really wanting as close to that 430,000 as they can get.

If you have a limit in mind then offer less than that so you have some leverage to play with. But not to offer too low as they may think you aren't serious.

We purchased a property that was listed at 250,000 to 265,000. Offered 255,000 and it went back and forth till we settled on 260,000. We really wanted it though!!

It can depend how long it has been on the market for too. Find out what their reasons for selling are, how long settlement would be as you can gage if they are wanting a quick sale or not! Ask the agent lots of questions as they have to give you answers.

Google how to make an offer on a house and there is some great tips on websites out there!! Good Luck!!