What is " lowball"

I am just surprised that people have no interest in making an effort to agree on a price in the middle, after all obo means the price is up for debate in my opinion.

Aroc, I have been ignored when offering 95% on items and it just made me wonder what obo meant is all. It will take more than rudeness from an anonymous person on the web to break my heart and I'll keep trying I guess, all in all I find this to be a great way to get exposure to gear not available around me and I've met some nice people as well.

50 % is way low I agree, and would never make an offer that low. I always try to make an offer consistent with prices I've seen recently and use that average as a start, buying or selling. I want to get a good price and thought it was because I love money, but I was reading the post above and found out that I have a genetic disposition towards being tight because of my race. Now I don't feel nearly as responsible for my behavior. Great responses, I never thought this post would draw the race card.

I think I have a better understanding of how to make my offers now but here is my next question.
When I make an offer I do it only when the money is set aside and I am ready to commit. I try not to have offers with different people at the same time. This means I am looking to buy now. How long do you guys wait for replies before making other offers?