I’ve got just over 100 screwdrivers. I knew I had a lot, but did realize how many until I moved and bought one of those big roll around tool boxes.
Zipties. Because they are second only to duct tape in their utility for almost any quick repair job. When I see a good deal on an assortment of sizes, I can’t resist buying them. Especially the little ones, those have been very useful lately. Once they are out of their packaging though, they are a little hard to manage, like putting toothpaste back in the the tube. A bundle resists going back in a bag or jar with others like a cat going in to a travel carrier. One corner of my workbench is kind of a mess with them now.
Little packets of screws and plastic anchors that come with furniture and other items. I usually prefer to just use my own screws (torx heads, better steel), but I save the ones it comes with because you never know when you’ll need small, cheap fasteners.
Rocks and fossils. So many rocks and fossils.
My wife and I have about 20 total pairs of skis. No where close to millions, but it’s a lot of skis for 2 people. Showing restraint, we only have about 10 pairs of ski boots between us.
The surplus reading glasses must be a universal experience. We certainly have too many reading glasses floating around the house. I seem to recall a running gag on the show Sanford & Son where Fred Sanford would reach into a drawer and remove handfuls of odd reading glasses.
Automatic knives (switchblades). I have between 120 and 140 nowadays.
Why? Well, it’s not because I want to equip the Jets and the Sharks. Back in the day, I was part of a security services company and most of us were licensed PIs. (We did corporate work only…no domestic.) Manufacturers and distributors would hire us to investigate the sale of stolen or counterfeit products. These were often knock-off sunglasses, t-shirts with sports logos, athletic apparel, and similar items. We would usually start with local flea markets and try to find the sources for the products. The most common way to do this would be to develop a relationship with the vendors by posing as “less than scrupulous” vendors from other locations. “Great shirts! They’re authentic? Where can I get some? Can you sell me a couple gross at a better price?”
If we were after the source of the fake Oakleys, for example, we would start by buying a carton of them, along with miscellaneous other items. “Gimme two dozen Oakleys, a dozen Michael Jordan jerseys, a gross of Hanes underwear, a carton of Midol, a dozen insulated mugs, and 25 assorted cheap Chinese switchblades.” We would actually only be interested in the first four items, but adding the mugs and switchblades obscured the fact.
You can see where this is going. Our clients only cared about the stolen/counterfeit items that could be used as evidence for prosecution, while the mugs and switchblades were excess junk to be disposed of. I’d keep some of the more interesting switchblades, and many of them were of very unusual designs. Sometimes they would be of fairly high quality. In the years since, I have picked up some more expensive models, but the majority of what I have dates back to undercover investigations. Sadly, all the insulated mugs are gone.
I somehow always keep the hex keys that come with stuff that Requires Some Assembly. At least I toss 'em in a designated cardboard box.
I have way too many plastic food containers. I have a big collection of LocknLock containers. I love them, but I will never be able to use them all. I just love containers. The thing is, I have the nice LocknLocks, but for some reason I keep my chocolate chips, rice, barley, etc., in plastic containers that were reused from other foods - like the container cashews came in. I keep telling myself that my next project is to get rid of those crappy containers and actually use the LocknLocks instead. My other favorite containers have a mesh basket inside. I store cut watermelon and cantaloupe in them. The fruit doesn’t get slimy from sitting in the juice. The Great Value cottage cheese containers are the best for storing cut onions. For some reason, those containers keep the onion smell from permeating the entire fridge better than any other container.
I have containers in a cupboard in the kitchen, on a shelf in the basement, and in a huge Rubbermaid bin in the basement. I will never NEED to buy another container in my life. But when I’m shopping, I’m always looking at containers. Certain ones will catch my eye - usually it’s the color! 
This thread scarily echoes the collecting thread
Lotta people just love useless accumulating.
Although I think @ZonexandScout’s story a couple posts up is really interesting. Shame you couldn’t have set up a flea market stall to sell off the decoy stuff you obtained that the clients didn’t care about.
Back when flea markets / “swap meets” were more about used goods, not new goods of uncertain provenance, I long suspected that mostly the same items just circulated between one seller and another. After they sold some stuff, they’d wander the same meet and buy other stuff from other vendors. Who in turn were doing the same thing. It was just a big churn of rusty tools, dented cookware, and well worn kid’s toys.
IME garage sales still work that way. People with full garages sell crap to other people with full garages. Who in turn sell it back to the first people. It’s the circle of crap. Excess crap.
When we were cleaning out my grandmother’s house after her death, I found a box full of cardboard tubes from the middle of toilet paper rolls. Whaaa…? I took it right to the other family members to let them know I’d found the family heirlooms. 
It’s not actually inexplicable, though. She was likely collecting stuff to be used in Sunday school arts & crafts at her church.
And, apparently, pads.
I have these, but not because I use them. I forget that I have them, or forget where they are. So if a project needs them I buy more. But for some reason I am hesitant to use them as if they are hard to get. So they just keep piling up and yes they are hard to store. So they’re kind of everywhere in the garage and on the floor and not being used. I should start using them more.
Oh god yes. And I so rarely use them.
How many of the markers have non-dried-up ink?
Ball point pens. I’m sure I’ve got a 100 or so floating around the house. Most got stuck in a pocket at work and accidentally found their way home. However, their are dozens that appear to be decades old that I have no real idea of their origins. Occasionally, I will go on a junk drawer crusade and figure out which pens still work and toss the surplus but for some reason even after doing so I can’t manage to find a working pen when I need one.
58 lbs for Jeff Bezos net worth
I do a lot of events. The amount of clothes I have from them is...*a lot*. I got one new knit hat beanie last year & four more this winter, every one customized in some way, stitching or a patch with the event name &/or year; that's on top of the hats & ear muffs/bands I already had. One event used to give us a new one every year. I also used (wide) rubber bands with them; a small bag in your pocket to use as needed; invariably not all were needed so I would usually come home with a partial small bag of 'em. Shoot 'em off the ceiling for a great cat toy!
Paper towel tubes are great with dogs, hum thru them to make noise & then either ‘beat’ the dog (they don’t hurt at all) until they grab it & rip it to shreds or throw a treat in one & crimp the ends with your hands for a tasty challenge for them. I was going to toss it anyway; I’m just tossing lots of little pieces.
Every one of them. I am ruthless when it comes to 86-ing non-writing writing instruments. You get one brief opportunity to write for me; if you fail, into the bin you go. I ain’t got time to be troubleshooting no Sharpie.
mmm
That’s why they call him mean!
Smart more like.
Anyone who puts a non-functioning writing instrument back in the drawer or cup or … deserves exactly what they get: a lifetime of frustration with near zero percentage of their pens working.
The problem of course is they inflict the same frustration on their innocent but long-suffering housemates.
Not to your level but me too. I pretty much never wore them so they ended up as thrift store donations. I eventually stopped taking home those stupid work t-shirts and other schwag. The only exception is the laster pointer which is a fun toy.