The listing, Dryer Dock - dryer quick connect thingy has ended.
I got this to be able to quickly check the hose at the place where it goes into the floor behind the dryer.
Unfortunately, in my particular case, it was not practical, I wanted it flush with the floor and I would have had to cut a slightly bigger hole and (yikes) crawl under the house. I had a bad dream a few days ago about a spider that turns into a big red jellyfish when you poke it. So this would not be a good time for that.
Apparently, it works great for some people, and for others it just doesn't fit their use. I recommend looking up "dryer dock" on Amazon and reading the reviews, before bidding on this. But hey, it's free shipping, so all you have to lose is some Listia points. How handy are you?