Happened to me a couple of times in my younger years. I always viewed it as the ultimate insult. Offering me more money because I am quitting only means that you've been taking advantage of me the whole time I worked there and were underpaying me.
YMMV.
That's my take on counteroffers, too.
I made myself a promise early in my career, and I've never broken it...as an employee I will never accept a counteroffer, and as a manager I would never extend one. I don't believe a counteroffer fixes the reason a person is looking.
People might say they're looking for more money, but I think in most cases it's because they weren't recognized, nor rewarded, in a timely fashion. A counteroffer doesn't change that. If you have to threaten to walk out the door to get more money, a counteroffer doesn't fix that kind of corporate culture and treatment.
So, I would never accept a counter when changing jobs.
As far as retiring for good, it would take what I call "crazy-stupid" money to get me to stay, meaning the company would have to be crazy and stupid to offer it, and I'd be crazy and stupid for turning it down. For example, I make in the low six figures. For me to even consider staying after I've decided to retire, they'd have to offer me about a million dollars (after taxes, also) just to stay on another six months. And no, I'm not joking. Which makes such a scenario impossible, because I'm not that valuable to the company.
Another poster commended about the "bare cube" and I fully agree with that, also. It's always been very easy for me to pack up and leave an office because I never decorate my cube with personal belongings. No pictures, no toys, no books, nothing. I've always been able to turn in my laptop and badge and walk out, and I like it that way.
I also plan on only giving two weeks. I'm just a peon, and my leaving with only two weeks notice would in no way impact the company. And if I'm retiring (as is my hope after this job) I don't care about future referrals anyway. While I won't burn bridges, I don't particularly care about pissing anybody off, either.
I've not made any friends at the place I'm at (don't want any, to be honest - I prefer to make friends with people outside my work environment) and never expect to work with, or deal with, these people ever again once I walk out the door. Once I quit and walk out, I'm done, and will never look back.