the object of which is to maximize the selling price. I know the term is sometimes used in the hobby to mean making a lower than market-price offer, hoping the seller accepts and minimizes the selling price.

I had to look this up to be sure, but Wikipedia has a whole series of selling techniques and terms that they define. Here is a link to a place to start if you're interested:

http://en.wikipedia.org/wiki/Low-ball

I think low-ball is also a poker game... but that's another story .