I've bought quite a few cows, bulls, and heifers out of the paper. I always offer a little less then they are listed for. Some times it works out sometimes I get a counter offer and sometimes the price is firm. If I like the animal and I think it's a fair price then they go home with me, if not I take an empty trailer home.
I also sell most of my heifers, and some pairs through ads in the local classifieds. I've never had anyone not ask for a lower price on anything - be it cattle or other equipment, ect. It does not offend me as long as they don't stand there and say stuff like Oh, they ain't really what I was looking for but I guess I could turn them for $500. No thank you, you are wasting my time, good bye.
I will work harder with someone that shows up with a trailer because I know they are serious, not just lookie loos waisting my time. I had 10 heifers for sale last time listed for $650, we settled on $635 a head and he took them all. I knew he was serious and the whole deal was done in less then 15 minutes. I like deals like that. My goal is to get $600 minimum for every calf that leaves the place. If I get more then that, which on average I usually do, then I figure I did real good.