Sellers: When do you drop your price?

I tried to sell a pair of speakers here a month ago. They were brand new, they didn’t work well with my amp but they were high end and decent speakers. Regardless what I listed it for, all the offers came in at around 55% of the original price. First I felt insulted. I didn’t understand why everyone’s offer was so low. Later I found out they wanted to flip it for a profit. Given that it was brand new, box, warranty and all, I still think it was disgraceful. I later figured that eventually someone will pay slightly more, someone who won’t flip it. It’s a matter of time. I would check how many of the same items are up for sale and if you want to sell, price it at the lowest or slightly lower than - and offer something extra

Just for your information so that you know all used  equipment is 50% off that's a given.

If there are any glowing reviews of your item, include a link. USAudiomart
is free. Not so here. Shark picks up pretty much everything so most
buyers look there first.
Maybe your question really is: "How do you price an item"?

" Just for your information so that you know all used equipment is 50% off that's a given"
that is true 20% of the time 100% of the time

I agree with millercarbon's 2nd paragraph. Ask a price that is fair and reasonable after doing some research and hold to it because if there are knowledgable buyers out there, they will know that and won't haggle just to shave a few bucks of one's price.   That is not to say that they can't or wouldn't make a counter-offer which you are free to accept or reject if you think it's close enough (or not).  But just dropping the price on your own is negotiating against yourself and shows lack of confidence and buyers will pick that up.