Do you have 5.25" and 8" floppy disks that are spare, low-quality, degrading, or just generally in bad shape?

I'd like to take my floppy disk data recovery game to the next level. I have equipment, but there's no substitute for experience. Therefore I'm looking for loose collections of old floppy disks to practice on. I'm especially interested in working with disks where the binder affixing the media to the donut is starting to fail.

I'm in London; will pay shipping; can pick up disks around here as well. Boosts are appreciated!

@stepleton Thats an interesting offer, I still have boxes of 5 1/4 disks from my youth, mostly copied video games, and I've tried imaging them but only had limited success. It'd be cool if I had some things which weren't in archive.org already which were recoverable.

I'm in the USA so I don't know if that is possible. I do have a spreadsheet printout where I captured all the filenames of the game disks from back in the day, but I don't know about the original file, it's probably on one of the data disks ;-)