Hard to give much feedback as you really didn't share much about what you are looking for; your location, just a single home building lot, a vast acreage, waterfront, etc., etc.
I've bought a bunch of raw ground over the years and always offer way less than asking price, they'll either accept, come back with a counter, or just give you flat NO. Better to start low and go up if you need to. If you do find the ideal piece that you are in love with and it falls within your budget range, act fast and buy it, because you likely won't get another chance in your lifetime.