The seller has the stuff you want.
MAYBE, they do. It depends on the price. A transaction by definition requires 2 parties. Not sure why you don't seem to get that. My point is mainly that if you want to sell successfully, a little courtesy and cooperation goes a long way towards improving the chances of that. No one is saying they should relinquish their stuff on buyer demand, or accept crazy low ball offers.
No, most buyers give away the only power they have by insisting on "the deal."
I really have no idea what you mean by this. I already mentioned a specific instance of my own where I held the line of a max price I was willing to pay and in the end it worked out for me. If I had accepted the seller's "final" price, I would have been throwing money away that I didn't want to spend on that particular gear (the drum set I mentioned). I'm not sure how that means I "gave up my power". In the end, I got the gear I wanted (I got a really nice albeit "beginner" 6 piece drum kit plus a few other odds and ends for less than $400 in overall great shape), at the price I wanted. All I had to do was walk away from the deal and let the guy come to his senses after a few days. Sure, it doesn't always go like that, but there's always other fun stuff to spend money on. I would have been if I walked away and that was the end of it, that's my whole point. Buyers walk away from deals too, it's not reserved for sellers as you seem to think.
it sounds like it's you who really need it
Not the guy who has a bloodthirst for any infidel who might DARE make an offer on his PRECIOUSSSSSSS gear? Ohhhhhhhhh k pal. Not sure why I'm getting ganged up for advocating courtesy and flexibility. Those to me seem like unassailably good things, but then again we live in an upside "flat earth and chemtrail" post factual world of craziness. So what the hell do I know?
I just set a good price and wait for someone to buy it. I don't deal with the haggling stuff when I know I've set the price right. Most of the time hagglers are indistinguishable form low ballers.
But like I said before, if you've truly set the price that way, you've already done the haggling for the person. That's not my preference, because in my experience, probably at least half of people are going to haggle no matter what (and I am close to that, unless something is just crazy cheap already). So I would rather set my prices with some "meat on the bone" to enable that. Plus, it can be hard to predict sometimes what someone might pay for a given item at a given time, so sometimes you get lucky with a slightly higher starting price. I had a high quality but VERY niche hifi item I was selling a few years ago on ebay. I started the bidding at the lowest I was willing to take (which was roughly the going rate), and set the buy it now at optimistically the highest I thought someone might go for. Between the time the ad went live while I was still checking things out and the time I checked my email a few minutes later, someone had ALREADY bought it. That's not necessarily common, but instances like that make a case for starting a bit higher but being willing to come down.
And even with that general practice, I rarely end up taking less for an item than I'd really like to get. And when I don't get as much as I want, it's usually because I don't have the budget and/or space to keep hanging onto something. On balance, I not only usually get as much as I want for items, but I usually come out ahead compared to what I paid. And part of that is because I'm also screening out obnoxious buyers who price things unrealistically high and are unwilling to negotiate.
Anyway, I think I've made my point well enough. Let the haters re-commence hating.