If you solicit offers, shouldn't you respond?

Sorry, but some offers don't warrant a response. It isn't rude to not respond some times. Some times it isn't work the effort or heart ache. Some people want to haggle. While others list at a "selling price" don't want to haggle or don't have room for lowering the price. So where is the point in responding. I recently listed a piece of equipment for sale. A Mark Levinson ML3 amp that weighs about 150 lbs or more crated. some people not only tried to lowball my more than fair price, but they also asked me to eat the expensive shipping costs. Some offers were courteous, but some were just rude. Fortunately, I really don't have to sell the unit and don't need the money. just clearing space. But you really shouldn't be insulted that the person didn't respond to your low offer. You should expect silence. If I feel the price is right or fair. I don' haggle. I simply tell the seller that I accept the asking price. If I don't like the price, well... I simply don't make an offer. I have better things to do than try to convince someone their price is too high. I, just like most of us have access to the blue book and can see the high/low and average prices for a used piece of equipment. I have found that many people actually bye as low as they can with no intention of keeping the unit, but instead try to flip it for higher.. Well, more power to them. I just don't have time for that type of deal making.